When a squid is threatened, it releases ink from a small pouch near its beak (inside the base of the tentacles) which quickly spreads to disguise the squid. While the predator is momentarily...
Two defense mechanisms squid use is their ink sac, and also their ability to camouflage. Squid can also move really quickly through their siphon, and jet propulsion.
squid use a kind of jet power. Water is squirted at great pressure out of a nozzle on the squid's body. At times the squid can swim so fast that it may pop out of the water and glide through the air....