Common name: Bluemoon parrotfish

General information

The Blacktail Parrotfish, scientifically known as Chlorurus atrilunula, is a vibrant and colorful species that adds both beauty and ecological value to a reef aquarium. This species is known for its striking appearance, with males showcasing a mix of bright green, blue, and pink hues, and a distinctive black tail that gives the fish its common name. Females and juveniles tend to have a more subdued coloration, often with a brownish base and less pronounced patterning.

In the wild, Chlorurus atrilunula plays a crucial role in the health of coral reefs by grazing on algae, which helps prevent algal overgrowth that can smother corals. They are a part of the Scaridae family, which are known for their beak-like teeth that are used to scrape algae from hard surfaces.

Care

Blacktail Parrotfish require large, well-established aquariums with plenty of live rock and space to swim. They are not suitable for small or nano tanks due to their size and active swimming behavior. These fish are herbivores and need a diet rich in marine algae and vegetable-based foods to maintain their health and vibrant coloration. Supplementing their diet with specially formulated parrotfish pellets or flakes can also be beneficial.

It's important to note that Chlorurus atrilunula can be quite territorial, especially towards conspecifics or similar-looking fish. Therefore, careful consideration should be given when adding them to a community tank to ensure compatibility with tank mates.

Reproduction

In the wild, Blacktail Parrotfish are protogynous hermaphrodites, meaning they are born female and have the ability to change to male later in life. This change is often triggered by social factors, such as the absence of a dominant male. In the aquarium setting, breeding these fish can be challenging due to their complex social structures and the large space required for their mating rituals.

Habitat

Chlorurus atrilunula is found in the Indo-Pacific region, particularly around coral reefs and lagoons. They prefer areas with abundant coral growth and clear waters where they can easily access their primary food source, algae. In the aquarium, replicating their natural environment with a variety of live rock formations and open swimming areas is key to their well-being.