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FishSaltwaterIntermediateSemi aggressive

Blue-throat Trigger

Xanthichthys mento

Also known as: Crosshatch Triggerfish

A rare triggerfish that schools in the wild and stays manageable in a reef setup.

Blue-throat Trigger
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Β© (c) National Coral Reef Monitoring Program - Pacific Region, some rights reserved (CC BY-NC) Β· CC-BY NC

About

The blue-throat trigger (Xanthichthys mento) is one of the more interesting triggers available to saltwater hobbyists, standing apart from its more notoriously destructive relatives in some genuinely useful ways. Males are the showier sex, displaying a vivid blue patch at the throat and a boldly patterned body with a reddish tail that gives rise to one of its alternate names. Females are more subdued but still attractively marked. In the wild, this species has a wide antitropical distribution across the Pacific, turning up around oceanic islands from Japan and Hawaii down to Easter Island and Pitcairn, as well as along some continental coastlines. Rather than lurking around the rockwork the way many triggers do, blue-throats are found schooling above drop-offs in open water, picking zooplankton from the current. A behavior that hints at why they tend to be somewhat less destructive to tankmates and corals than other members of the family. That said, they are still genuinely territorial, and you will want to choose tankmates that can hold their own. Crustaceans are best kept out of the picture entirely. With reasonable planning around compatibility, this is actually a manageable species for hobbyists who do not yet have years of marine experience, and with proper care it can live for decades.

Frequently asked questions

How big does the Blue-throat Trigger get?
The Blue-throat Trigger reaches about 7–24" as an adult.
What size tank does the Blue-throat Trigger need?
A minimum of 70 gallons is recommended for the Blue-throat Trigger, with more room needed for a proper group.
What water parameters does the Blue-throat Trigger need?
The Blue-throat Trigger does best with a temperature of 72–78Β°F, a pH of 8.1–8.4, hardness around 8–12 dGH.
Is the Blue-throat Trigger aggressive?
The Blue-throat Trigger is semi-aggressive. It can work in a community with careful tankmate choices and enough space.
What does the Blue-throat Trigger eat?
The Blue-throat Trigger is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.
How long does the Blue-throat Trigger live?
With good care, the Blue-throat Trigger typically lives 20-30 years.
Is the Blue-throat Trigger reef safe?
The Blue-throat Trigger is not considered reliably reef safe and may harm corals or invertebrates.