Bicolor Parrotfish

The Bicolor Parrotfish, *Cetoscarus bicolor*, is a stunning and active addition to a large, mature marine aquarium. As its name suggests, this species exhibits a dramatic color change throughout its life. Juveniles are primarily white with a prominent black stripe running horizontally along the body and a yellow tail. As they mature, they transition into the vibrant adult coloration, with males displaying a striking blue-green body and pinkish-orange fins, while females are typically more reddish-brown with a lighter underside.

A minimum tank size of 180 gallons is recommended to accommodate the active swimming habits and potential adult size of the Bicolor Parrotfish. A mature aquarium with ample live rock is essential, as they are primarily herbivores and will graze on algae. They are known to consume large amounts of algae, making them excellent algae controllers in a suitable environment. However, their powerful beaks can damage live rock and potentially nip at corals and other invertebrates, so they are best suited for a fish-only or FOWLR (Fish Only With Live Rock) aquarium.

In the wild, Bicolor Parrotfish primarily feed on algae and the coral polyps they scrape from the reef. In the aquarium, their diet should consist of a variety of marine algae, high-quality herbivore pellets and flakes, and occasional offerings of mysis shrimp or other meaty foods. Providing a diverse diet is crucial for their long-term health and vibrant coloration.

Bicolor Parrotfish are protogynous hermaphrodites, meaning they are born female and can change to male later in life. Breeding in captivity is extremely difficult and rarely achieved. There are noticeable color differences between adult males and females.