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Long-nosed Butterfly FishTrumpet fish
Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Actinopterygii Family: Aulostomidae Genus: Aulostomus Species: chinensis 
Scientific name: Aulostomus chinensis
Common name: Trumpet fish
Hawaiian name: Nunu

Trumpet fish are very widely distributed, ranging from East Africa across the Indo-Pacific to Hawaii and the Easter Island, north to southern Japan south to Lord Howe Island and to the Eastern Central Pacific. They are common members of Turtle Reef. They are usually solitary and more rarely found in the company of others. Trumpet fish are in the same family as seahorses and, like seahorses, suck their prey into their elongated mouth (called pipetting). Also like seahorses, Trumpet fish have elaborate courtship and mating rituals following which the female passes off the eggs to the male to brood and parent.

Trumpet fish are opportunistic predators and use stealth and cunning to hunt both day and night. They prey on small fishes, shrimps and other crustaceans. Their body shape is well adapted for stalking and ambush. Their profile head-on is tiny. They hunt primarily by sight, although other senses may also play important roles. Typically, they will hang vertically over the reef, drifting on the currents to strike at prey animals passing beneath. Trumpet fish also use various forms of cover including divers and turtles to sneak up on unsuspecting prey. They have two common color forms. The yellow color form closely matches the color of the yellow tang. These ones frequently attach themselves to schools of yellow tang to disguise their presence from potential prey. Others are brownish with horizontal stripes, vertical bars and a yellow tail. The brown-colored trumpet fish use the same stalking-horse technique but, by contrast, they shadow large fishes such as the peacock grouper.

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