Cannibals, like this sea butterfly mollusk, that eats its next of kin.

Over this period most other high valued species had reached a production plateau, with the exception of certain small tunas and cephalopod fisheries.

There's a good reason why the shallow water's full of predators here's a barracuda and if you're an octopus or a cephalopod, you need to really understand how to use your surroundings to hide.

There's a good reason why the shallow water's full of predators here's a barracuda and if you're an octopus or a cephalopod, you need to really understand how to use your surroundings to hide.