Squid siblings often team up. Very social animals with communication done by color flashing. Humboldt squid have a very high social intelligence compared to a solitary animal like most octopus. Unfortunately that live fast and die young still applies. They need to hunt to grow and they're not adverse to cannibalism. Still, need to be smart to team up and hunt with a crew that will eat you given the opportunity. Ruthless killers and frighteningly intelligent pack hunters that signal to each other which prey they're going after.

That is bizarre!

Makes sense for the animals that spray their offspring en masse