Care Level: Easy
Reef Compatible: No
General Description: The Humu Rectangle Triggerfish, also simply referred to as the Rectangle or Rectangulus Trigger in addition to also being called the Wedge-tail Trigger, has a wide distribution from the Pacific Ocean to the Indian Ocean. Despite this huge natural range, this species is best known as the state fish of Hawaii called humuhumunukunukuapua’a. Less colorful than its close relative the Humu Humu Trigger (Rhinecanthus aculeatus), the Rectangle trigger has an overall tan body but with some very notable markings that include a wide black diagonal body band and a black wedge-shaped marking at the base of its caudal fin that has iridescent greenish lines in front of it. Somewhat aggressive in nature, the Rectangle trigger makes an excellent addition to a larger fish-only with live rock aquarium. Triggerfish, in general, are known to be somewhat vocal and the Rectangle trigger is no exception, occasionally heard making a grunt sound. An adult Rectangle trigger can reach a size of approximately 10″. Note: This species is infrequently available.
Diet Requirements: Rectangle triggers are carnivores. A diet consisting of various proteins and frozen preparations such as brine shrimp, squid, mysis shrimp, krill, chopped fish, and clams will maintain optimal health and coloration. Occasionally give foods with hard shells to wear down their ever growing teeth.
Care Requirements: A minimum 125 gallon aquarium that is at least 18″ wide is ideal. Smaller specimens can be temporarily raised in smaller quarters (no less than 75 gallons) as long as it is upgraded accordingly. The Rectangle trigger appreciates some live rock in the aquarium, especially caves and crevices to swim around and take refuge in; it is not uncommon for triggerfish to wedge themselves into a tight space if felt threatened. Rectangle triggers are best kept as one individual per aquarium; compatability with other trigger species is variable. Rectangle triggers will consume invertebrates and nip at corals, which is why they are not recommended for reef aquariums. Many timid and peaceful fish species should be avoided as tank mates with a Rectangle trigger. Recommended water conditions, 72-78° F, KH 8-12, pH 8.1-8.4, salinity 1.020-1.025.
Purchase Size: Small: 2″ to 3″; Medium: 3″ to 4″; Large: 4-1/2″ to 5-1/2″
Note: Your item may not look identical to the image provided due to variation within species. Purchase sizes are approximate.