Give 3 examples of how mollusks that lack shells protect themselves.

Squids: Without a shell protects, it protects itself by ink, deep sea squids can also detach their arms
 
Cuttlefish: Even though cuttlefish don't have a shell, they can actually shape sift and are the kings of camouflage
 
Octopus: Finally, octopuses can bite their enemies with a powerful venom