Mainly in coastal habitats in semi-silty conditions (Ref. 48635); also found near caves and crevices in rocky and coral reefs from a few meters to at least 100 m. A predator that feeds on surprisingly large prey, swallowed whole through its expandable jaws (Ref. 48635). Feeds mainly on fishes. Secretes the skin toxin grammistin under stress (Ref. 2334).