I WONDER - How Do Mollusks Protect Themselves?

The video discusses how mollusks protect themselves. Those with shells, like many mollusks, use them to hide from predators. In contrast, shell-less mollusks like squid and octopi use camouflage to blend into their surroundings, making it difficult for predators to spot them. Additionally, they can release a black inky liquid to distract and confuse enemies.

Describe how color change helps squid and octopi.

What substance do squid release to confuse their enemies?