Cercodema anceps are filter feeders, meaning they eat microorganisms from the water. Specifically, they use their tentacles to catch food and move it to their mouth.
Members of the Cucumariidae family reproduce in a variety of ways. Some are hermaphorditic and some brood their eggs. There is limited research on C. anceps specifically so their reproductive strategies are not well known. Interestingly, at least four species within the order Dendrochirotida are capable of asexual reproduction by breaking off sections of their body and regenerating those parts. It is possible that C. anceps are able to asexually reproduce in the same fashion.