The surgeon fish species known as the Blue Tang fish is officially named as Paracanthurus hepatus. It is distinguished by its vivid blue hue and oval-shaped body. These are some of the Blue Tang fish's salient features:

The Blue Tang fish has a vivid blue hue on its flat, disk-like body. It features a yellow tail fin and a black "palette" that curves sharply towards the tail near the eyes. They have a golden colouring while they are young, which gradually changes into a brilliant blue as they get older.

Size: Blue Tangs often reach lengths of 12 to 15 centimetres (4.7 to 5.9 inches). However, some people can grow up to 30 centimetres (12 inches) in length.

Habitat: The Indo-Pacific region, including places like the Great Barrier Reef, the Red Sea, and the shores of East Africa, is where Blue Tangs are most frequently seen. They prefer to reside in lagoons and coral reefs, where they can find cover and eat algae.

Diet: Blue tangs fish are predominantly algae-eating herbivores. They scrape algae off of coral and rocks using their tiny, projecting jaws.

Behaviour: These fish typically form schools or groups in their habitat and exhibit peaceful behaviour. They are renowned for their agility and quick swimming.

Reproduction: The Blue Tang fish is an oviparous species, which means it reproduces by depositing eggs. They discharge eggs into the water column during spawning, where they are left to mature and hatch.