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Reef Triggerfish

Reef Triggerfish, Rhinecanthus rectangulus The Reef Triggerfish is also known as the Wedge-tail Triggerfish, the Rectangular Triggerfish and the V-line Humu Humu.  It is often confused with the Picasso Trigger.   The Reef Triggerfish is the official fish representing the state of Hawaii.  The name Humu Humu (triggerfish) comes from Hawaiian and Humuhumu-nukunuku-apua'a refers to the pig-like snout that it and the Picasso Trigger have and use to "root" around the reef.  The Reef Trigger frequents the outer edges of coral reefs of the central and western Pacific, including the Red Sea. It has a tan body with dark bands. Its distinctive features include blue/black strips across its eyes, blue lips and a black wedge at the base of the caudal fin, which is outlined in brown and yellow.  The Reef Trigger is highly maneuverable and changes directions quickly.

Triggerfish have a double dorsal fin with a large spine in the front area of the fin. It uses the spine to lock itself into rocks and corals where it sleeps for the night, well protected from predators. Triggers have been known to sleep on their sides as well.

The Reef Trigger is reasonably easy to keep, but is not reef safe and is not a good community fish. Reef Triggers are also territorial, so it is best to keep only one in the tank. They are less aggressive than the Clown Trigger and a good choice for your first purchase of triggerfish. The tank should be a minimum of 75 gallons, with 140 gallons preferred.  It should have plenty of places to hide plus open areas for swimming. 

Reef Triggerfish, Rhinecanthus rectangulusIn the wild, Reef Triggers feed on algae and invertebrates.  In captivity, they can feed on regular live, frozen and flake foods. This can include squid, shrimp, krill, mussels, pieces of fish, starfish, sea urchins, shellfish and small fish. Their diet can be supplemented with spirulina, algae, dried seaweed and quality flake foods. Triggerfish use their mouths to blow over invertebrates and attack them in their soft undersides. They can be very aggressive when eating.  They will bite fingers, but can be hand fed.  They will also disturb items in the tank.

There are no known sexual differences. Reef Triggers are egg layers and they are not bred in captivity. 

Reef Triggerfish, Rhinecanthus rectangulus

Reef Triggerfish, Rhinecanthus rectangulus

 Scientific Name:   Rhinecanthus rectangulus
 Family:   Balistidae
 Care   Normal
 Temperature:   22 - 26 C; 72 - 78 F
 pH   8.1 - 8.4
 dH   8 - 12
 Specific gravity   1.020 - 1.023
 Size:    30 cm; 12 inches
 Breeding: 
  Egg Layer
 Life Span:    years
 Crustacean Safe?
  No
 Coral Safe? 
  Yes

Compatibility:


Only one Triggerfish per tank, although recommendations of compatibility with Redtoothed Triggerfish have been noted.  Keep with large basses, groupers, large surgeonfish, aggressive eels, lionfish and puffers.  Do not keep with invertebrates.

Reef Triggerfish, Rhinecanthus rectangulus

Reef Triggerfish, Rhinecanthus rectangulus
juvenile

Tropical fish and aquarium information about saltwater species, fish care, fish facts, compatibility and aquarium maintenance.