vampire squid makes them sound cute, they are literally the scum of the earth: They are leeching billions from what is normally a tax funded sector and on the side heavily polarising publishing and access to science in favor of rich countries.
Yeah they are more like Humboldt squid. They live below most things, in the dark, and surface when it is dark. They will eat others, of their own kind, if they are injured, or otherwise inhibited, or because their group isn't finding adequate feeding fast enough.