Dispar Anthias Care Guide: Tank Setup, Feeding, and Compatibility

If you’re looking to add vibrant color and lively movement to your reef aquarium, the Dispar Anthias (Nemanthias dispar) is one of the most rewarding choices available. Also known as the Redfin Anthias or Peach Anthias, this stunning Indo-Pacific species is a favorite among saltwater hobbyists, and for good reason. Here’s everything you need to know to keep them thriving.

What Is the Dispar Anthias?

The Dispar Anthias is native to the warm, coral-rich waters of the Indo-Pacific, ranging from the Red Sea to the Western Pacific Ocean. In the wild, they form large schools in shallow reef areas and lagoons, feeding on zooplankton that drifts through the water column. They grow to about 3.5–4 inches (9–10 cm) as adults and can live up to five years with proper care.

One of the most fascinating traits of this species is that all Dispar Anthias are born female. When no dominant male is present, the most dominant female in the group undergoes a natural sex change to become male. Males are noticeably larger and sport a striking red dorsal fin, while females display softer yellow-orange tones that fade to a pale underside.

Tank Setup for Dispar Anthias

A minimum tank size of 55–70 gallons is needed for a small group, but a larger setup of 100 gallons or more is strongly recommended if you plan to keep the recommended group of five or more fish. These are active, open-water swimmers that need horizontal swimming space, so longer tanks are preferable to taller ones.

Your aquascape should include plenty of live rock to provide hiding spots and shelter, while still maintaining open swimming areas to mimic their natural reef environment. Moderate to strong water flow is important. Dispar Anthias are found in shallow reef zones and can tolerate the higher-intensity lighting that most reef tanks require, unlike many other anthias species.

Keep water temperature between 72–78°F, pH at 8.1–8.4, and specific gravity between 1.023–1.025. A quality protein skimmer and regular water changes are essential, as these fish have a high metabolism and contribute significantly to the tank’s bioload.

Feeding Dispar Anthias

Feeding is one of the most critical aspects of Dispar Anthias care. These fish have fast metabolisms and must be fed 3–5 times per day in small amounts. In the wild, they feed continuously on zooplankton drifting past them, so replicating this feeding pattern is key to keeping them healthy and colorful.

A varied diet works best. Offer frozen mysis shrimp, vitamin-enriched brine shrimp, copepods, and small krill. High-quality marine pellets can also be incorporated. Supplementing with vitamin-enriched foods helps maintain their brilliant coloration and supports their immune system. An automatic feeder is a practical investment for maintaining the frequent feeding schedule these fish require.

Compatibility and Social Structure

Dispar Anthias are peaceful, reef-safe fish that do not bother corals or invertebrates. They should be kept in groups and never as a solitary specimen, as isolation causes stress and often leads to rapid decline. A group of five or more is ideal, with a single male leading several females.

Never house two males together, as they will fight aggressively until only one remains. Suitable tankmates include clownfish, gobies, cardinalfish, and peaceful tangs. Avoid aggressive or large predatory fish that may bully or prey on them.

Always quarantine new Dispar Anthias for at least two weeks before adding them to your display tank. This prevents the introduction of parasites and allows you to confirm they are eating well. At Dr. Reef’s Quarantined Fish, every fish goes through a thorough quarantine process so you can be confident in the health of what you add to your reef.