The rift eelpout, Thermarces cerberus (Zoarcidae), is a deep-sea marine fish that inhabits the vicinity of the hydrothermal vents of the East Pacific Rise. Its skeleton is mineralized to a normal degree and is constituted of acellular bone as the majority of perciforms, to which it belongs. T. cerberus feeds on amphipod crustaceans and gastropods, and has thin sharp teeth constituted of an orthodentine cone with a thin external apical layer of enameloid. The histological characteristics of the skeleton (jaws and vertebrae) appear normal with seasonal growth marks. There is no evidence that the physicochemical characteristics of the deep-sea hydrothermal environment of this species play a specific role on its bone anatomy and physiology.