Genus species (Animalia): Rhinecanthus aculeatus

The lagoon triggerfish (Rhinecanthus aculeatus), also known as the blackbar triggerfish, the Picasso triggerfish, or the Picassofish, is a triggerfish, up to 30 cm in length, found on reefs in the Indo-Pacific region. The Hawaiian name for the fish, humuhumunukunukuāpuaʻa (pronounced [ˈhumuˈhumuˈnukuˈnukuˈwaːpuˈwɐʔə]), also spelled humuhumu-nukunuku-a-puaʻa or just humuhumu for short (meaning "triggerfish with a snout like a pig") is shared with the reef triggerfish (R. rectangulus), the state fish of Hawaii. This species has been studied in a range of research contexts, from locomotion to color vision research.

Commonly found in subtidal reef flats and shallow protected lagoons, Juveniles are secretive with rubble patches, adults swim about openly but are usually shy. Territorial. Feed on algae, detritus, mollusks, crustaceans, worms, sea urchins, fishes, corals, tunicates, forams, and eggs. Oviparous. Sleep on its side; makes a whirring noise when alarmed. Also caught with drive-in nets and is considered a popular aquarium fish.

Rhinecanthus

Rhinecanthus is a triggerfish genus from the Indo-Pacific. They are found at reefs, and all except R. abyssus are restricted to relatively shallow depths. They are among the smallest members of the family, with no species surpassing 30 centimeters (12 in) in length. They are primarily brownish, grayish and white, and have strongly contrasting patterns in yellow, orange, blue or black. Adults of all have a relatively dark line (in most species intermixed with blue) that extends from the forehead down through the eye to the pectoral fin.

Reference: Wikipedia