---
type: species
title: "Dispar Anthias Care Guide: Keeping the Peach Fairy Basslet Healthy"
slug: "dispar-anthias"
category: "saltwater"
scientificName: "Pseudanthias dispar"
subcategory: "Anthias"
lastUpdated: "2026-04-26"
readingTime: 10
url: https://www.fishstores.org/species/dispar-anthias
---

# Dispar Anthias Care Guide: Keeping the Peach Fairy Basslet Healthy

*Pseudanthias dispar*

Master Dispar Anthias care. Learn about their unique feeding needs, schooling behavior, and how to keep Pseudanthias dispar thriving in your reef tank.

## Species Overview

The Dispar Anthias (*Pseudanthias dispar*), often sold as the Peach Fairy Basslet or Madder Fairypuzzler, is one of the more attainable members of a notoriously demanding genus. Where many anthias species earn their reputation as fish-room casualties, *P. dispar* sits at the easier end of the spectrum — still not a beginner fish, but realistic for an intermediate reef keeper who is willing to feed multiple times a day and quarantine properly.

In the wild, these fish hover in dense shoals along the upper reef slopes of the Indo-Pacific, picking copepods and zooplankton out of the current. Bringing that behavior into a home tank is the entire challenge: feed them like the planktivores they are, give them flow they can lean into, and respect the harem dynamics that govern their social structure.

| Field       | Value                   |
| ----------- | ----------------------- |
| Adult size  | 3.5 in (9 cm)           |
| Lifespan    | 4-7 years               |
| Min tank    | 75 gallons              |
| Temperament | Peaceful schooling      |
| Difficulty  | Intermediate-Advanced   |
| Diet        | Carnivore (planktivore) |

### Identification: Peach vs. Pink Coloration and Dorsal Fin Markers

Female Dispar Anthias are a uniform peach-orange wash from gill plate to caudal fin, with a slightly paler belly and unmarked fins. Males are unmistakable when in display: the body deepens to a saturated red-orange, a magenta blush develops across the head and pectoral region, and the first dorsal spine elongates dramatically into a tall, sail-like flag tipped in red. That elongated dorsal is the easiest single field-mark for sexing animals in a store tank.

The look-alike to watch for is *Pseudanthias ignitus*, the Flame Anthias. Ignitus males carry more uniform red across the body and a shorter, less flag-shaped dorsal extension. If you are paying for a male Dispar specifically, ask the store to confirm the species against an invoice — the two are routinely mixed in shipments.

### Sexual Dimorphism: Identifying the Dominant Male

Like all *Pseudanthias*, Dispar Anthias are protogynous hermaphrodites — every fish starts life female, and the dominant individual in a group will transition to male if no male is present. That transition can take six to ten weeks and is irreversible. This is why most stores sell groups of females and a single, more expensive male; the alternative is buying five females and waiting for one to "color up" on her own.

The dominant male polices a harem of females in a loose territory. He is the one flaring his dorsal, chasing rivals, and posturing during feeding. Subordinate females form a soft hierarchy beneath him and will display muted versions of the male's color flashes when fed.

### Natural Habitat: Indo-Pacific Reef Slopes and Current Zones

Dispar Anthias are collected primarily from the western Pacific — Fiji, the Solomons, Indonesia, and the Great Barrier Reef — at depths of 15 to 50 feet on the seaward face of the reef. They orient into the prevailing current, holding station above the rubble zone where wave action funnels plankton up the reef wall.

The takeaway for the home tank: these fish evolved in clean, oxygen-saturated, fast-moving water. A stagnant 40-gallon cube will never support them, no matter how good the food is. Replicating reef-crest flow is as important as the menu.

## Water Parameters & Tank Requirements

### Ideal Conditions: 72-78°F, pH 8.1-8.4, and Specific Gravity 1.023-1.025

Dispar Anthias want stable, clean reef water. The tolerances below are not generous — anthias are among the first species to react to swings in pH or salinity, and chronic ammonia or nitrite exposure will kill them long before it bothers a clownfish.

| Parameter         | Target            | Notes                                         |
| ----------------- | ----------------- | --------------------------------------------- |
| Temperature       | 72-78°F (22-25°C) | Lower end extends lifespan; avoid >80°F       |
| pH                | 8.1-8.4           | Stability matters more than the exact number  |
| Specific gravity  | 1.023-1.025       | 1.025 for full reef compatibility             |
| Ammonia / Nitrite | 0 ppm             | Quarantine before introducing to display      |
| Nitrate           | \<10 ppm          | Anthias are sensitive to chronic NO3 above 20 |
| Alkalinity        | 8-11 dKH          | Stable dKH supports the corals they live with |

### Flow and Oxygenation: Simulating High-Energy Reef Crests

Aim for total tank turnover of 25 to 40 times per hour through a combination of return flow and powerheads. The goal is not to blast individual fish across the tank — it is to create a chaotic, gyre-style flow pattern that fish can pick a lane in. Two opposing wavemakers running on a pulsed schedule do this better than a single high-output pump.

Surface agitation matters as much as in-tank flow. Anthias have a high metabolic oxygen demand and will gasp at the surface if dissolved oxygen drops, which it tends to do in warm tanks with poor surface movement. A skimmer with a strong wet-skim cycle helps; a dedicated air stone overnight is a cheap insurance policy in summer.

### Minimum Tank Size: Why 75+ Gallons Is Necessary for Social Groups

A single Dispar Anthias can technically survive in a 55-gallon tank, but you should never keep one alone — the species is fundamentally social, and isolated individuals stop eating, lose color, and die within months. The realistic minimum for a small harem of one male and three to four females is a 75-gallon tank with at least 48 inches of horizontal swimming length. A 90 or 120-gallon tank is better and gives you room to expand the harem to five or six females.

For broader saltwater stocking math and tank-footprint considerations, our [saltwater aquarium guide](/guides/saltwater-aquarium) covers the relationship between volume, surface area, and bioload that drives most early reef-tank failures.

> **Tall tanks are a poor match for anthias**
>
> Dispar Anthias use horizontal swimming distance to disperse aggression and to school. A 75-gallon "tall" with a 36-inch footprint is meaningfully worse than a 75-gallon "long" with a 60-inch footprint, even though the volumes are identical. Always check footprint before footprint volume when sizing for schooling reef fish.

## Diet & Feeding (The Critical Success Factor)

This is where Dispar Anthias make or break your reef tank. Their high metabolism is not optional — if you cannot meet it, the species will starve in front of you over the course of three to four weeks. There is no workaround.

### High-Frequency Feeding: Managing a High Metabolic Rate (3-5x Daily)

Plan on three to five small feedings spread across daylight hours. A single large feeding once or twice a day does not cut it; planktivores graze continuously in the wild, and their digestive tract is sized for steady throughput, not big meals. If you work a normal schedule and cannot break for midday feedings, an automatic feeder loaded with quality pellets is not a luxury, it is a prerequisite.

A practical rhythm for most home tanks looks like this: a frozen feeding before work, two pellet auto-feeder doses during the day, a mixed frozen-and-vitamin-soaked feeding in the evening, and one final pellet drop just before lights out. Dispar Anthias should be visibly hunting at every feeding window — flared, alert, and competing for food.

### Best Foods: Vitamin-Enriched Brine, Mysis, and Calanus

Build the diet around small, meaty marine foods. The core rotation should include enriched mysis shrimp, calanus copepods, vitamin-soaked brine shrimp, finely chopped silversides, and a quality reef-pellet base. Soak frozen foods in a vitamin supplement like Selcon (HUFA + vitamin A and C) two or three times per week — this single habit closes the gap between "surviving" and "thriving" for the whole anthias family.

Live copepods cultured in a refugium or dosed from a bottle are excellent supplements, especially for newly arrived fish that have not yet started eating prepared food. They mimic exactly what these fish hunt in the wild and will often trigger a feeding response in animals that are otherwise refusing.

### Training to Prepared Foods: Transitioning to High-Quality Flakes/Pellets

A wild-caught Dispar Anthias may take a week or two to recognize pellets as food. Start by hand-broadcasting a small amount of pellets along with their preferred frozen food at the same time — they will hit the frozen, miss, and incidentally take pellets in the process. Within ten to fourteen days most individuals will accept a small reef pellet (around 1mm) as a primary food.

> **Auto-feeders are not optional for working hobbyists**
>
> If your schedule keeps you out of the house for nine or ten hours at a stretch, install a programmable auto-feeder before the fish arrive — not after. The single most common cause of Dispar Anthias attrition in home reefs is a fish that lost too much condition during the first two weeks because it only ate twice a day. A $40 auto-feeder dosing pellets at 11 AM and 2 PM solves it permanently.

## Tank Mates & Compatibility

### The Harem Dynamic: One Male to Multiple Females

Stock as a single male with three to six females, or as a group of females only and let one transition. The harem structure spreads the male's chasing across multiple targets and keeps any single female from being harassed to exhaustion. A pair (one male, one female) usually fails — the female absorbs the entire output of the male's territorial behavior and stops feeding.

Add the entire group at the same time. Introducing a single new female into an established harem usually ends with the newcomer hiding in a corner, refusing to eat, and dying within ten days. If you must add later, consider rearranging the rockwork the same day to scramble territories.

### Reef Safety: Interaction with SPS, LPS, and Ornamental Shrimp

Dispar Anthias are 100% reef-safe. They are pure water-column planktivores — they do not nip stony corals, do not bother soft corals, do not pick at zoanthids, and do not bother clams or other sessile invertebrates. Ornamental shrimp like skunk cleaners and fire shrimp are also safe; the anthias may briefly investigate molting shrimp but will not predate them.

This makes the species one of the better choices for high-value SPS systems where coral nipping is a deal-breaker.

### Suitable Neighbors: Blennies, Tangs, and Peaceful Wrasses

The best community partners are calm, mid-water species that occupy a different niche. [Tomini tangs](/species/tomini-tang) and [yellow tangs](/species/yellow-tang) work well as algae-grazers that won't compete for the planktivore feeding zone. [Lawnmower blennies](/species/lawnmower-blenny) and [tailspot blennies](/species/tailspot-blenny) take the lower rockwork niche without provoking the anthias. [Six-line wrasses](/species/six-line-wrasse) and [melanurus wrasses](/species/melanurus-wrasse) are good options as long as the tank is large enough to disperse wrasse aggression. [Banggai cardinalfish](/species/banggai-cardinalfish) and [royal grammas](/species/royal-gramma) make peaceful, attractive complements.

Avoid pairing with aggressive eaters that will out-compete them at feeding time — large angelfish, hungry triggerfish, and bullying dottybacks will starve the anthias by claiming every food drop. For a broader compatibility picture, our [saltwater fish guide](/guides/saltwater-fish) covers the temperament tiers across common reef species.

## Common Health Issues

### Uronema marinum: Prevention and Identification

*Uronema* is the parasite that disproportionately kills anthias. It presents as raw, ulcerated patches on the body — most commonly along the flanks or near the anal fin — that progress rapidly over 48 to 72 hours. Once visible lesions appear, mortality is high.

Prevention rests on three things: low chronic stress, clean water, and a complete quarantine before display introduction. *Uronema* opportunistically attacks fish whose immune systems are already suppressed by shipping or poor parameters. Maintain nitrate below 10 ppm and feed a vitamin-rich diet to keep immune function intact.

### Shipping Stress: Acclimation Protocols for Sensitive Anthias

Drip-acclimate Dispar Anthias slowly — plan on 90 to 120 minutes at three to four drops per second from the bag water to a separate acclimation container (never the display). Watch for pH and ammonia in the bag water; long shipments produce ammonia spikes that become acutely toxic when exposed to higher pH on arrival. Prazi-bath the fish during quarantine intake as a routine prophylactic.

For full saltwater acclimation procedure, our [how to acclimate fish](/guides/how-to-acclimate-fish) guide walks through the drip method, temperature matching, and the quarantine handoff in detail.

### Decompression Issues: Signs of Swim Bladder Distress in New Arrivals

Anthias are sometimes collected from depths where rapid ascent leaves them with ruptured or over-inflated swim bladders. Watch for fish that float head-up or list to one side, or that struggle to maintain neutral buoyancy in a calm portion of the tank. Mild cases self-resolve within a few days as gas reabsorbs; severe cases require a vet who can needle-aspirate the bladder. Most reputable importers use needle-decompression on the boat, but it is worth asking your LFS about their supplier.

## Where to Buy & What to Look For

### LFS Inspection: Checking for "Pinched Bellies" and Active Swimming

The single best in-store visual cue is the belly profile. A healthy Dispar Anthias has a rounded, well-fed midsection. A "pinched" belly — concave, sucked-in, with the lateral musculature visible — is a fish that has not been eating, and it is at least 50% likely to die in your tank no matter what you do. Walk away from pinched fish even if the price is good.

Active swimming above the rocks is the second cue. Anthias that hide in caves or hover listlessly near the substrate at the store will hide in caves and hover listlessly in your tank. Look for fish that are out, oriented into the flow, and reactive to movement at the front of the tank.

> **Local Fish Store Health Check: ask them to feed in front of you**
>
> Before you put money down on a Dispar Anthias, ask the store to feed the fish in front of you. A healthy specimen should aggressively strike at the food within seconds — flaring fins, charging out from the rockwork, competing with tankmates. A fish that ignores the food, picks half-heartedly, or stays in its cave is not eating reliably yet, and importing it home will make that worse, not better. This single test eliminates more anthias losses than any acclimation protocol.

### Quarantine Best Practices: Observation vs. Prophylactic Treatment

Run every Dispar Anthias through a minimum 4-week quarantine in a bare-bottom 20 to 30-gallon tank with PVC hides, mature sponge filtration, and stable parameters. Most experienced reefers use a prophylactic approach for the anthias family: a single Prazi-Pro round on intake to clear flukes, a copper or chloroquine course for ich and velvet, and observation for the remainder of the period.

If you see early *Uronema* signs (small white patches, scratching against rockwork) during quarantine, formalin baths under a vet's guidance are the standard intervention. Do not introduce a suspect fish to the display under any circumstances — *Uronema* will spread to existing anthias and is essentially impossible to eradicate from a stocked reef.

### Buyer Checklist

- [ ] Belly is rounded and full, not pinched or concave
- [ ] Fish is actively swimming above the rockwork, not hiding
- [ ] Strong, immediate feeding response when the store offers food
- [ ] No raw patches, ulcers, or red lesions on flanks
- [ ] Eyes are clear, fins are intact and unclamped
- [ ] Breathing rate is steady (not rapid or labored)
- [ ] Confirmed species identification (not look-alike P. ignitus)
- [ ] Source store quarantines new arrivals or you will quarantine at home

## Quick-Reference Cheat Sheet

| Parameter         | Target                          | Notes                                        |
| ----------------- | ------------------------------- | -------------------------------------------- |
| Adult size        | 3.5 in (9 cm)                   | Females slightly smaller than dominant male  |
| Lifespan          | 4-7 years                       | With proper feeding and stable water         |
| Min tank size     | 75 gallons                      | 48-inch footprint minimum for harem          |
| Group size        | 1 male + 3-5 females            | Or all-female group; pair structures fail    |
| Temperature       | 72-78°F                         | Stable; avoid summer spikes >80°F            |
| pH / SG           | 8.1-8.4 / 1.023-1.025           | Reef-standard; stability over precise number |
| Diet              | Mysis, copepods, brine, pellets | Vitamin-soak frozen foods 2-3x/week          |
| Feeding frequency | 3-5x daily                      | Auto-feeder essential for working hobbyists  |
| Reef safe         | Yes (100%)                      | Pure planktivore; no coral or invert risk    |
| Common disease    | Uronema marinum                 | Quarantine 4+ weeks; prophylactic treatment  |

Dispar Anthias reward keepers who treat them as the high-metabolism schooling planktivores they are. Get the feeding schedule right, give them a footprint they can swim in, and pick healthy fish that are already eating in the store — and a small harem of *Pseudanthias dispar* will be one of the most active, colorful, and genuinely engaging additions to a peaceful reef tank.

## Frequently Asked Questions

### Are Dispar Anthias hard to keep?

They are considered moderate-to-difficult because of their high metabolism. They require multiple feedings per day and pristine water quality. They are not recommended for beginners who cannot commit to a strict feeding schedule or use an auto-feeder.

### How many Dispar Anthias should be kept together?

They should be kept in groups of at least 3 to 5. In the wild, they live in large shoals. In a home aquarium, a single male with a group of females helps disperse aggression and encourages natural social behavior.

### Will Dispar Anthias eat coral?

No, Dispar Anthias are 100% reef-safe. They are planktivores that feed on small crustaceans drifting in the water column. They will not nip at stony corals, soft corals, or sessile invertebrates like clams.

### Can you keep two male Dispar Anthias together?

It is not recommended unless the tank is exceptionally large (200+ gallons). In standard reef tanks, males will fight for dominance until only one remains. It is best to buy one male or a group of juveniles or females.

### Why is my Dispar Anthias hiding?

New arrivals are notoriously shy. Ensure there are plenty of rock caves and high water flow. If hiding persists, check for aggressive tank mates or signs of Uronema, a common parasite in the Anthias family.

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