The predators that ate the anglers’ fish were often sharks ... Using multiple methodologies that included social media, online angler surveys ... and genetic analysis, the study uncovers ...

They further added how an angler fish is a "true predator of the depths" and lives between 200 and 2,000 meters deep. It uses its "dorsal appendage full of symbiotic bioluminescent bacteria as ...

Angler fish live in deep water ... Swimming together in shoals makes it harder for fish to be caught by predators, but not by fishermen. Herring and mackerel swim in shoals.