by Niriah Medley

Humuhumunukunukuapa'a Facts

Humuhumunukunukuapua'a is the Hawaiian name for the Reef Triggerfish.

~They are called Humuhumu for short.

~The Humuhumu has 2 spines.

~It's scientific name is Rhinecanthus Rectangulus

~When threatened grunting sounds are made to warn other triggerfish.


  • When threatened, the trigger fish dives into a hole or crevice in the reef, then wedges itself into the shelter by erecting the large dorsal spine on its head.
  • They are often found alone and are very aggressive when other fish come around.
  • The Humuhumu can shoot jets of water out their mouth when threatened.
  • Often found spitting sand out their mouth to sift the sand for food.
  • The Humuhumu propels itself through the water using waving like motions


-These fish are carnivores and they spend their days eating crabs, shrimp, sea urchins, worms.

-They will also pick at clams and other animals attached to corals, which makes it look like they are eating from the coral.

-You may also see triggerfish eating other smaller fish.


  • The Reef Triggerfish is the Hawaiian state fish.
  • Hawaii is known for its tropical flora and fauna.
  • In May of 2006 Governor Linda Lingle signed a bill that permanently established the humuhumunukunukuāpua‘a as the State Fish of Hawaii
Octonauts s1e49 - the humuhumunukunukuapua-a.avi