Why is it called Picasso triggerfish?

The Picasso triggerfish is named after the famous painter Pablo Picasso because its striped pattern looks like a painter's color palette

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 [ˈhumuˈhumuˈnukuˈnukuˈwa:puˈwɐʔə]), 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.

Behavior

Lagoon triggerfish live in the reefs and sandy areas of coral reefs, where they eat just about anything that comes along, mostly including invertebrates and reef algae. They are always restlessly swimming around and vigorously protect their territory against intruders, including divers, especially when guarding their eggs during reproduction season. Their relatively small size makes them much less dangerous than the larger titan triggerfish of the same family.

The fish moves through the water by using waving motions in its dorsal and anal fins, allowing it to move more precisely. Using these movements, it can move forwards, backwards or simply hover in place above the reef. This means that it can more easily back out of crevices than other unidirectional fish.

This species has one type of single cone (SC), with visual pigment peaking in sensitivity at 413 nm (S), and a double cone with different visual pigments in each member peaking at 480 nm (M) and 530 nm (L) respectively. Behavioural research has provided evidence that individual members of the double cones can act as independent channels of colour information, aiding in understanding double cone function.This research suggests the species has trichromatic vision, like humans.

The Picasso triggerfish is NOT REEF SAFE.

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