Common name: calico box crab

General information

The Blue Spot Tang, Hepatus epheliticus, also known as the Atlantic Blue Tang or Coco Tang, is a vibrant marine fish that adds both color and activity to a saltwater aquarium. This species is known for its striking blue spots against a dark body, which can vary from deep blue to purple hues. The Blue Spot Tang is a member of the family Acanthuridae, which includes surgeonfishes and tangs, recognized for the scalpel-like spine on either side of the caudal peduncle, used for defense.

Care

Blue Spot Tangs require a spacious aquarium to accommodate their active swimming habits, ideally 125 gallons or larger. They thrive in well-oxygenated water with strong water movement and plenty of live rock for grazing on algae. These tangs are herbivores and should be provided with a diet rich in marine algae and vegetable matter. Supplementing with dried seaweed or nori can help maintain their health and coloration.

Reproduction

In the wild, Blue Spot Tangs are known to form spawning aggregations. However, breeding them in captivity is challenging and rarely successful. They are broadcast spawners, releasing eggs and sperm into the water column where fertilization occurs.

Symbiosis

While not known for specific symbiotic relationships like clownfish with anemones, Blue Spot Tangs can contribute to a symbiotic environment within the reef by grazing on algae, which helps control algae growth and provides a cleaner habitat for other reef inhabitants.

Habitat

Blue Spot Tangs are found in the Western Atlantic, from New York to Brazil, including the Gulf of Mexico and the Caribbean Sea. They inhabit coral reefs and rocky areas, typically at depths ranging from 2 to 40 meters. In the aquarium, replicating their natural environment with plenty of hiding places and open swimming areas is beneficial for their well-being.