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About Chocolate Mimic Tang

The Chocolate Mimic Tang is a fascinating surgeonfish known for its dark chocolate-brown adult colouration and remarkable ability to mimic the appearance of other fish during its juvenile stage.

Juvenile Chocolate Mimic Tangs can closely resemble different angelfish species, particularly lemonpeel-type angelfish. As they mature, their colouration changes dramatically into the darker brown and yellowish pattern characteristic of adult fish.

They are active swimmers and algae grazers that appreciate a large mature aquarium with plenty of live rock. Their specialised mouth is well suited to grazing algae and biofilm from rock surfaces.

Chocolate Mimic Tangs are generally peaceful towards many community fish but can become territorial towards other tangs, particularly similarly shaped surgeonfish. Plenty of swimming space and carefully planned aquascaping can help minimise aggression.

They are generally reef safe and will normally leave corals alone.

Quick Care Guide

Scientific Name: Acanthurus pyroferus
Common Name: Chocolate Mimic Tang / Mimic Tang
Family: Acanthuridae
Type: Marine Fish / Surgeonfish
Adult Size: Approximately 25 cm
Temperament: Semi-Territorial
Care Level: Intermediate
Minimum Aquarium: 450 L+
Temperature: 24–28°C
pH: 8.0–8.4
Salinity: 1.023–1.026 SG
Diet: Herbivore / Omnivore
Tank Level: All Levels
Reef Safe: Yes
Suitable For: Large mature reef aquariums and marine systems

Frequently Asked Questions

Why is it called a Mimic Tang?

Juvenile Chocolate Mimic Tangs mimic the colouration and shape of other fish, particularly certain angelfish. This juvenile appearance changes as the fish matures.

How big does a Chocolate Mimic Tang get?

They can reach approximately 25 cm, so they require substantial swimming space as adults.

Are Chocolate Mimic Tangs reef safe?

Yes. They are generally considered reef safe and are excellent algae grazers for established reef aquariums.

What do Chocolate Mimic Tangs eat?

They primarily graze on algae and biofilm. Provide regular access to nori, marine algae, Spirulina-based foods and quality herbivore pellets.

Can Chocolate Mimic Tangs be kept with other tangs?

They can become territorial towards other surgeonfish. Compatibility depends on aquarium size, species selection and aquascaping. Avoid overcrowding the aquarium with similarly shaped tangs.

Common Mistakes

Buying one without planning for its adult size
Juveniles can be deceptively small, but adults require a large aquarium.

Not providing enough algae-based food
Regular marine algae and nori should form an important part of their diet.

Keeping too many tangs in one aquarium
Territorial behaviour can become significant between surgeonfish.

Adding one to an immature aquarium
A mature system with established live rock provides valuable grazing opportunities.

Not providing enough swimming space
Chocolate Mimic Tangs are active swimmers and need plenty of open water.