It is used to kill prey and to tear it into pieces small enough to ingest. Squid use a jet propulsion system to power themselves through the water and have three hearts that pump blue blood.

Both will squirt clouds of ink, partly made of melanin, to confuse attackers and use that jet propulsion to make a quick getaway. Some squid can even get airborne with this technique: they jet ...

Tusoteuthis moved via jet propulsion—it expelled water through a siphon on the lower part of its body. Squirts of dark inky fluid sometimes helped the squid blind and confuse predators like the ...