Hawaiian Dascyllus.
Small, fiercely territorial damselfish endemic to Hawaiʻi — black with a bright white side spot, always sheltering inside a single coral head.
The Hawaiian dascyllus, called ʻālōʻilōʻi, is endemic to Hawaiʻi and one of the most familiar little black-and-white damselfish you'll see snorkeling here. Each fish stays within darting distance of a single coral colony — usually cauliflower coral (Pocillopora) — and rushes back into the branches at the first sign of danger.
Despite their small size, dascyllus are famously bold. They will charge fish many times their size, including unsuspecting human snorkelers, to defend their patch of coral. Males clear and tend a small patch of rock as a nesting site, where females lay eggs that the male then guards aggressively until they hatch.
Their tight relationship with branching corals means dascyllus populations rise and fall with the health of those colonies — a useful indicator species for reef recovery after bleaching events.
More species in this group.
Humuhumunukunukuāpuaʻa
The reef triggerfish — Hawaiʻi's official state fish, with a name that means "fish that sews with a needle and grunts like a pig."
Yellow Tang
The vivid lemon-yellow surgeonfish that flashes through every Hawaiian reef — and one of the most recognizable fish in the world.
Moorish Idol
Iconic black, white and yellow reef fish with a long sweeping dorsal filament — solitary, mysterious, famously hard to keep in captivity.
Raccoon Butterflyfish
Golden butterflyfish with a black bandit's mask. Often paired for life and one of the most common nighttime feeders on the reef.