How did the mollusca escape or protect itself from predators?

Mollusca have developed various strategies to escape or protect themselves from predators. Many possess hard, calcareous shells that provide physical protection against attacks. Some species, like octopuses, can use camouflage to blend into their surroundings, while others can expel ink to obscure their escape. Additionally, certain mollusks have evolved toxic or distasteful chemicals to deter potential predators.