Generally nocturnal, the round ribbontail ray can be solitary or gregarious, and is an active predator of small, benthic molluscs, crustaceans, and bony fishes.
en.wikipedia.org Influence of population decline, fishing, and spawner variability on the recovery of marine fishes.
en.wikipedia.org Common food items include tuna-like fishes, particularly skipjack tuna and frigate mackerel (also known as frigate tuna), squid, mackerel, and scad.
en.wikipedia.org With flabby muscles and a large oily liver, the false catshark is a slow-moving predator and scavenger of a variety of fishes and invertebrates.
en.wikipedia.org