---
type: species
title: "Cleaner Wrasse Care Guide: Keeping Labroides dimidiatus Healthy"
slug: "cleaner-wrasse"
category: "saltwater"
scientificName: "Labroides dimidiatus"
subcategory: "Wrasse"
lastUpdated: "2026-04-26"
readingTime: 10
url: https://www.fishstores.org/species/cleaner-wrasse
---

# Cleaner Wrasse Care Guide: Keeping Labroides dimidiatus Healthy

*Labroides dimidiatus*

Master Cleaner Wrasse care. Learn about their unique cleaning station behavior, dietary needs, and how to help this beneficial reef fish thrive in captivity.

## Species Overview

The cleaner wrasse (*Labroides dimidiatus*) occupies a position in reef ecology that no other commonly imported fish can match. On a wild Indo-Pacific reef, dozens of larger fish — tangs, groupers, parrotfish, even moray eels — line up at recognized "cleaning stations" to have parasites, dead scales, and mucus picked from their bodies, gills, and mouths by these small, electric-blue wrasses. The relationship is so well-established that predator species suspend their hunting instinct for the duration of the cleaning, and the wrasses move freely inside mouths full of teeth that could crush them in an instant.

That same behavior is what tempts hobbyists to add them to home reef tanks, and it is also what kills the vast majority of them within 60 days of purchase. Cleaner wrasses are not a parasite control tool — they are a specialized obligate cleaner with a calorie demand a captive system cannot satisfy through natural foraging alone. Buy one without a feeding plan, and you are buying a slow death. Buy one that is already eating prepared foods at the store, with the right tank mates and a 3-to-5-feeding daily schedule, and you have one of the most engaging, intelligent reef fish in the hobby.

| Field       | Value                        |
| ----------- | ---------------------------- |
| Adult size  | 5.5 in (14 cm)               |
| Lifespan    | 4-7 years (captive)          |
| Min tank    | 30 gallons                   |
| Temperament | Peaceful, semi-territorial   |
| Difficulty  | Advanced                     |
| Diet        | Carnivore (obligate cleaner) |

### The "Cleaning Station" Social Hierarchy

Cleaner wrasses do not roam — they hold territory at a specific landmark on the reef called a cleaning station, usually a coral head or rocky outcrop. Client fish approach the station, signal their willingness to be cleaned by adopting a head-up or motionless "T-pose," and the wrasse begins working over the body, gills, and mouth. A single wrasse can service hundreds of clients per day in the wild.

This species is also a protogynous sequential hermaphrodite — every individual is born female, and the largest fish in a social group transforms into a male. In a captive setting with a single wrasse, you will almost never see this transition because there is no social pressure to trigger it. If you do attempt a pair (advanced keepers only), purchase both fish at the same time and at noticeably different sizes so the larger animal can establish dominance without prolonged combat.

The cleaning behavior itself is hardwired. Even a fish that has never seen a client species before will attempt to clean its tank mates within hours of acclimation. This is charming when a tang accepts the service — and a problem when a wrasse harasses a fish that finds the picking unwelcome.

### Identifying *Labroides dimidiatus* vs. False Cleaner Blennies

The most expensive identification mistake a new saltwater hobbyist can make is buying a False Cleaner Blenny (*Aspidontus taeniatus*) thinking it is a cleaner wrasse. The blenny has evolved a near-perfect mimic of *Labroides dimidiatus* — same electric blue body, same horizontal black stripe, same approximate size. It exploits the visual signal to get close to client fish, then bites a chunk of fin or scale and bolts.

There are two reliable tells. First, the mouth position. A real cleaner wrasse has a terminal mouth at the very front of the head, perfectly positioned for picking. The false cleaner has an underslung, almost shark-like mouth set well below the snout, designed for biting upward into prey. Second, the swimming style. Cleaner wrasses swim with continuous, fluid pectoral fin propulsion typical of the wrasse family. Blennies hop and dart with stiff body undulations, more like a goby. If the fish at the store looks like it is "perched" rather than swimming, it is almost certainly the mimic.

> **Inspect the mouth before paying**
>
> At a busy LFS, juvenile cleaner wrasses and false cleaner blennies are sometimes mixed in the same display tank by mistake. Ask the staff to net the specific fish you want and examine the mouth from the side at the bag. A terminal mouth means wrasse; an underslung mouth means blenny — and the blenny will shred your tangs and angels within a week of release.

### Natural Habitat: Indo-Pacific Coral Reefs

In the wild, *Labroides dimidiatus* ranges across the entire Indo-Pacific, from the Red Sea and East Africa to French Polynesia, Japan, and northern Australia. They occupy outer reef slopes and lagoonal patch reefs at depths of 3 to 100 feet, almost always associated with structurally complex coral heads that provide both vertical relief for cleaning stations and horizontal swimming corridors between them. Water in these habitats is consistently warm (76-82°F), highly oxygenated by surge and current, and crystal clear with strong reef lighting.

A captive system that mimics this layout — open swimming length, vertical rockwork providing distinct "stations," strong flow, and stable salinity — is far more important than tank volume alone. A 75-gallon tank with thoughtful aquascaping and circulation outperforms a 90-gallon cube with poor flow every time.

## Water Parameters & Tank Requirements

The cleaner wrasse is not parameter-sensitive in the sense that a goby or seahorse is, but it is brutally sensitive to swings, low oxygen, and sudden salinity drops during water changes. Stability matters more than chasing exact numbers.

### Minimum Tank Size (30+ Gallons for Swimming Space)

The frequently cited 30-gallon minimum is a floor, not a target. A cleaner wrasse spends nearly every waking hour swimming — the species rarely sits still — and that constant activity in a small box rapidly burns through fat reserves the fish struggles to replace. A 55-gallon tank is a more realistic minimum for a single wrasse expected to live more than a year, and a 75-gallon or larger system gives the fish enough room to establish multiple cleaning stations and patrol patterns.

Tank length matters more than depth or width. A long, shallow footprint encourages active swimming, while a tall hex-style tank confines the fish to a smaller usable horizontal range. If you are still planning your build, see our [saltwater aquarium guide](/guides/saltwater-aquarium) for footprint recommendations and our broader [saltwater fish guide](/guides/saltwater-fish) for stocking context.

### Specific Parameters: 72-78°F, pH 8.1-8.4, Salinity 1.020-1.025

Target the following numbers and, more importantly, hold them steady week to week:

| Parameter     | Target       | Notes                                               |
| ------------- | ------------ | --------------------------------------------------- |
| Temperature   | 76-78°F      | Drift no more than 2°F in 24 hours                  |
| Salinity      | 1.024-1.026  | Reef-standard; never drop below 1.020               |
| pH            | 8.1-8.4      | Stable matters more than the exact value            |
| Alkalinity    | 8-11 dKH     | Critical for any reef coexistence                   |
| Ammonia       | 0 ppm        | Zero tolerance; fully cycle before adding           |
| Nitrate       | Under 10 ppm | Wrasses tolerate higher, but cleaning clients won't |
| Min tank size | 30 gallons   | 55+ gallons strongly recommended                    |

### The Importance of High Oxygenation and Tight Lids

Two non-negotiable husbandry items separate cleaner wrasses that thrive from cleaner wrasses that perish in the first week. The first is dissolved oxygen — these are reef-slope fish accustomed to constant water motion, and a tank with weak flow or warm summertime temperatures can leave them gasping near the surface. Run two powerheads aimed at opposite ends of the tank, target at least 20x turnover per hour, and keep the temperature at the cooler end of the range during summer months.

The second is a tight, gap-free lid. Cleaner wrasses are champion jumpers. They sleep wedged in rockwork or wrapped in a self-secreted mucus cocoon, but during the day a startled fish will rocket out of any opening larger than its head. Use a glass top, a custom mesh screen, or eggcrate panels — and seal every cord pass-through. "I'll get to the lid next weekend" is a sentence that has ended hundreds of cleaner wrasse keeping attempts.

## Diet & Feeding: The Biggest Challenge

This is the single hardest aspect of keeping the species and the reason most cleaner wrasses die in captivity. Get the feeding right and they are surprisingly hardy. Get it wrong and no amount of pristine water chemistry will save them.

### Why Parasites Alone Aren't Enough (Caloric Deficit)

In the wild, a cleaner wrasse processes thousands of cleaning interactions per day. Each pick yields a tiny amount of mucus, dead skin, or the occasional parasite — but the cumulative volume across an 8-hour reef day adds up to enough calories to sustain the fish's high metabolism. A home aquarium might house 6 to 10 fish total. Even if every one of them allowed daily cleaning, the wrasse would consume in 20 minutes everything available, then face 23 hours of nothing.

This is the math that kills "natural feeders." A wrasse expected to subsist on captive parasites will lose noticeable body mass within 10 days, develop the classic concave belly profile within 3 weeks, and die of starvation within 6 to 8 weeks regardless of how rich the rockwork looks. Supplemental feeding is not optional — it is the entire feeding plan, with cleaning behavior as a secondary calorie source.

### Transitioning to Prepared Foods: Mysis, Brine, and High-Protein Pellets

The single best predictor of long-term success is whether the fish was already eating prepared foods at the store. Buying a wrasse and hoping it will start eating in your tank is a coin flip with bad odds. Buying one you watched eat mysis in front of you is a 70-80% survival proposition.

Build the diet around three staples: frozen mysis shrimp (the highest-value item — feed twice daily minimum), enriched frozen brine shrimp (good supplemental protein but lower nutritional density), and a high-quality small-pellet food soaked in selcon or a similar HUFA enrichment. Rotate in finely chopped fresh seafood — raw shrimp, scallop, clam — once or twice a week for variety. Avoid freeze-dried foods, which the species rarely accepts.

If your wrasse has not eaten within 48 hours of arrival, try live brine shrimp as a stimulant. Most cleaner wrasses cannot resist live food, and once they break the fast, transitioning back to frozen mysis usually happens within a week.

### Frequency: The Need for 3-5 Feedings Per Day

A single daily feeding will not maintain a cleaner wrasse. Their gut transit time is short, their metabolism is hot, and their fat storage capacity is minimal. Plan for a minimum of three feedings per day — morning, midday, evening — and ideally five small meals if you are home or running an automatic feeder for prepared pellets.

This is the same feeding philosophy required for [Anthias species](/species/lyretail-anthias) and several wrasses including [leopard wrasses](/species/leopard-wrasse) and [melanurus wrasses](/species/melanurus-wrasse). If you are not willing to commit to 3+ daily feedings indefinitely, this species is not a fit for your lifestyle. There is no shortcut.

> **The they-will-eat-the-parasites myth**
>
> Adding a cleaner wrasse to combat a Marine Ich outbreak is one of the most persistent and damaging myths in saltwater keeping. The wrasse cannot eat enough cysts to control an infestation, the stress of a sick tank often kills the wrasse first, and the only proven Ich treatment is copper or tank-transfer in a dedicated quarantine system away from corals. Treat parasites with medication; treat your wrasse like the high-maintenance carnivore it is.

## Tank Mates & Compatibility

Cleaner wrasses are uniquely compatible with most reef inhabitants because their cleaning behavior is read as a service, not a threat. Compatibility issues run in one direction — what eats the wrasse, not what the wrasse eats.

### Ideal "Clients": Tangs, Large Angels, and Groupers

The species shines in a tank stocked with mid-to-large-bodied fish that benefit from cleaning. Tangs are the classic pairing — a [yellow tang](/species/yellow-tang), [blue hippo tang](/species/blue-hippo-tang), [naso tang](/species/naso-tang), or [tomini tang](/species/tomini-tang) will visit a cleaning station daily, and the relationship visibly reduces stress in the tang.

Larger angelfish like the [coral beauty angelfish](/species/coral-beauty-angelfish), [flame angelfish](/species/flame-angelfish), and [emperor angelfish](/species/emperor-angelfish) also accept cleaning readily. Groupers, hawkfish, and even most triggerfish recognize the cleaner-wrasse signal and suspend predatory behavior in their presence — though this is reef instinct, not a guarantee, and you should not house a wrasse with a known fin-nipper or oversized predator without a backup plan.

Smaller, peaceful tank mates like [ocellaris clownfish](/species/ocellaris-clownfish), [royal grammas](/species/royal-gramma), [firefish gobies](/species/firefish-goby), and [chalk bass](/species/chalk-bass) coexist with cleaner wrasses without issue, though they rarely participate in cleaning interactions.

### Species to Avoid: Predatory Eels and Aggressive Wrasses

The "cleaner immunity" rule has hard limits. Hungry [snowflake moray eels](/species/snowflake-moray-eel) and especially [zebra moray eels](/species/zebra-moray-eel) usually leave wrasses alone, but a hungry green moray or oversized predator may strike at night when the cleaner is sleeping in the rocks. Avoid lionfish entirely — a [fuzzy dwarf lionfish](/species/fuzzy-dwarf-lionfish) will inhale a sleeping cleaner.

The bigger compatibility issue is other wrasses. Cleaner wrasses are intensely territorial toward conspecifics and toward similarly shaped wrasses. Avoid pairing with a [six-line wrasse](/species/six-line-wrasse), [christmas wrasse](/species/christmas-wrasse), or [mystery wrasse](/species/mystery-wrasse) in tanks under 100 gallons — the more aggressive species will harass the cleaner relentlessly. Larger systems with extensive rockwork can mix wrasse species, but plan it deliberately.

### Reef Safety: Are They Coral-Safe?

Yes — fully and unconditionally. *Labroides dimidiatus* will not nip corals, will not bother clams, will not eat ornamental shrimp like [skunk cleaner shrimp](/species/skunk-cleaner-shrimp) or [peppermint shrimp](/species/peppermint-shrimp), and will not damage tube worms or feather dusters. They are one of the safest "interesting" fish you can add to a mixed reef, which is part of why their fragility is so frustrating — keepers who can support the diet get a perfectly reef-compatible centerpiece animal.

## Common Health Issues

Cleaner wrasse mortality follows a predictable pattern: starvation, then stress collapse, then rare parasite issues. Solve the first two and you have eliminated nearly all common causes of death.

### Starvation and "Pinched Belly" Syndrome

The earliest visible sign of trouble is a concave or "pinched" belly profile. A healthy cleaner wrasse has a slightly convex underside; a fish whose belly is flat or slightly hollow when viewed from the side is already in caloric deficit, and a visibly pinched belly means the fish has been losing weight for 7-14 days.

Recovery is possible if you catch it early. Increase feeding frequency to 5+ times per day, introduce live brine to stimulate appetite, and rule out competition from faster eaters like [chromis](/species/blue-green-chromis) or [anthias](/species/dispar-anthias) that may be intercepting food before it reaches the wrasse. If the belly remains pinched after 2 weeks of aggressive feeding, the fish has likely passed the point of recovery.

### Shipping Stress and Acclimation Sensitivity

The 72 hours after a cleaner wrasse arrives at your house are the highest-risk window of its captive life. Wild-caught specimens (which is most of the supply) have already endured collection, holding, transshipping, wholesaler tanks, and finally your LFS — often 3 to 5 separate tank moves over 1 to 2 weeks before they reach you.

Use slow drip acclimation over 60-90 minutes, match temperature precisely, dim the lights for the first 24 hours, and resist the urge to feed for the first 6-12 hours. Our [how to acclimate fish guide](/guides/how-to-acclimate-fish) covers the full procedure for stressed shipments. Quarantine in a darkened, parameter-stable QT system for 14-21 days is strongly recommended — this is also the window where you confirm the fish is eating before committing it to the display.

> **Do not skip quarantine for delicate fish**
>
> A common mistake is reasoning that a stressed wrasse will do better in the display than in a sterile QT tank. The opposite is true. A QT lets you observe feeding closely, treat parasites without reef-tank chemistry conflicts, and isolate any pathogens before they reach your other livestock. For a cleaner wrasse, the QT period is also when you confirm a fish that ate at the store is still eating in your water — a transition that fails surprisingly often.

### Internal Parasites in Wild-Caught Specimens

A small but real percentage of wild-caught cleaner wrasses arrive with internal parasites that do not respond to standard external treatments. Symptoms include white, stringy feces, eating without weight gain, and gradual decline despite normal water chemistry. Treatment with metronidazole-soaked food or a praziquantel-based dewormer for 3-5 days resolves most cases, though some specimens are too far gone by the time symptoms appear.

This is a strong argument for sourcing captive-bred specimens whenever possible. Biota Aquariums in Palau is currently the only large-scale producer of captive-bred *Labroides dimidiatus*, and their fish arrive already eating prepared foods, parasite-free, and accustomed to captive water chemistry. The price premium (often 2-3x wild-caught) is more than offset by survival rates that exceed 90%.

## Where to Buy & What to Look For

The single most important purchasing decision is sourcing. The second is the in-store inspection. Get both right and your odds of success climb from roughly 20% to over 80%.

### The Ethics of Wild-Caught vs. Biota Captive-Bred

Wild collection of cleaner wrasses has a documented ecological cost. Each wrasse removed from a reef station eliminates a service relied on by dozens of other fish, and post-collection mortality through the supply chain is estimated above 80% — meaning four or five fish die for every one that reaches a home aquarium alive. Several conservation organizations have called for hobbyist boycotts of wild-caught specimens for this reason.

Captive-bred Biota cleaner wrasses bypass this entirely. They arrive eating prepared foods, parameter-stable, and free of the catastrophic shipping mortality that plagues wild fish. Expect to pay $80-$150 versus $25-$45 for wild-caught — and recognize that the wild-caught "savings" disappears the first time you have to replace a dead fish.

### LFS Inspection: Checking for Active Feeding and Clear Eyes

Before paying for any cleaner wrasse, run through this in-store checklist. Skip any of these and you are gambling.

### Buyer Checklist

- [ ] Active swimming throughout the tank, not hiding in rockwork or hovering motionless near a corner.
- [ ] Convex belly profile, not flat or pinched — view from the side to assess.
- [ ] Clear, non-cloudy eyes with no white film, pop-eye, or asymmetry.
- [ ] Intact fins with no torn edges, white patches, or red streaking.
- [ ] Terminal mouth position confirming wrasse identity (not the underslung blenny mimic).
- [ ] Bright coloration with crisp blue and black stripes, no faded or grayed-out areas.
- [ ] Active interest in tank mates — attempting cleaning behavior on neighbors is a strong positive sign.
- [ ] Confirmed feeding response — see the next callout for the in-store feeding test.
- [ ] Source disclosure — ask whether the fish is wild-caught or Biota captive-bred, and how long it has been in the store.

> **The Local Fish Store Feeding Test**
>
> Before you commit to buying, ask the LFS employee to feed the specific cleaner wrasse you are considering — frozen mysis is the standard test food. A healthy, transition-ready wrasse will dart out and accept the food within 30 seconds, often before the food even settles. A wrasse that ignores food, picks at it tentatively, or hides during feeding is either too stressed, too far into starvation, or a wild fish that has not transitioned. Politely decline and ask the store to hold it until it is reliably feeding. Any LFS that refuses this simple test is not a store you should be buying delicate fish from.

A reliable LFS that quarantines incoming livestock for 1-2 weeks before sale, keeps cleaner wrasses in well-stocked display tanks where they can clean naturally, and stocks Biota captive-bred specimens is worth driving a significant distance to support. The fish will cost more up front and survive far longer than a same-day pickup from a big-box store with a 7-day return policy and a tank full of starving wild imports.

## Quick-Reference Cheat Sheet

| Stat               | Value                                     |
| ------------------ | ----------------------------------------- |
| Scientific name    | Labroides dimidiatus                      |
| Common names       | Cleaner wrasse, Bluestreak cleaner wrasse |
| Adult size         | 5.5 in (14 cm)                            |
| Lifespan (captive) | 4-7 years                                 |
| Min tank size      | 30 gal (55+ recommended)                  |
| Temperature        | 76-78°F                                   |
| Salinity           | 1.024-1.026                               |
| pH                 | 8.1-8.4                                   |
| Diet               | Carnivore — mysis, brine, pellets         |
| Feedings per day   | 3-5                                       |
| Reef safe          | Yes                                       |
| Sourcing           | Biota captive-bred preferred              |

The cleaner wrasse rewards a specific kind of keeper: one who can commit to multiple daily feedings indefinitely, who is willing to pay 2-3x more for a captive-bred specimen, and who treats the in-store feeding test as a non-negotiable purchase requirement. Skip those steps and you are joining the 80% of buyers whose wrasse dies within two months. Take them seriously and you get one of the most fascinating, intelligent, behaviorally rich fish in the entire saltwater hobby — a centerpiece animal that turns your reef tank into a working cleaning station.

**Find a local fish store** — [Find stores near me](https://www.fishstores.org/near-me)

## Frequently Asked Questions

### Do cleaner wrasses actually eat Ich?

While they eat some external parasites, they primarily consume nutrient-rich mucus and dead skin. They are not a 100% cure for a heavy Marine Ich outbreak and should not replace proper quarantine and copper-based treatment.

### Can you keep two cleaner wrasses together?

Only in very large systems of 180 gallons or more, or as an established mated pair purchased together. In smaller tanks, they are highly territorial toward their own kind and the dominant fish will starve or kill its rival.

### Why did my cleaner wrasse die after a week?

Most die from starvation or shipping stress. They have an extremely high metabolism and rarely find enough natural parasites in a home aquarium to survive without 3-5 supplemental feedings of mysis, brine, and high-protein pellets per day.

### Are cleaner wrasses reef safe?

Yes, they are completely reef safe. They will not bother corals, clams, or most ornamental invertebrates, and they actively benefit other fish by removing parasites, dead scales, and mucus during their cleaning behavior.

### How can I tell a real cleaner wrasse from a false one?

Look at the mouth position. The real cleaner wrasse has a terminal mouth at the front of the head, while the False Cleaner Blenny has an underslung mouth tucked beneath the snout and small fangs used to nip fins and steal scales.

---
*Source: [FishStores.org](https://www.fishstores.org/species/cleaner-wrasse)*
*Last updated: April 26, 2026*