Adults inhabit lagoons and seaward reefs . They are found in caves, crevices and on flat surfaces of coral, sponges or rubble with algae . Some live on live corals . Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites . Larvae are planktonic which occur primarily in shallow, nearshore waters .
Dorsal spines (total): 15; Anal spines: 1; Anal soft rays: 18 - 21. Enlarged jaws, with the lower jaw protruding .: elongated.
Behavioural data for Largemouth triplefin is currently being reviewed.
Diet information for Largemouth triplefin is currently being compiled.
Reproduction data for Largemouth triplefin is currently being compiled.
Marine; reef-associated; depth range 2 - 41 m , usually 2 - 32 m . Tropical east to American Samoa and Rapa.
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