Final answer:
In Finding Nemo, the crab evades seagulls with a defense mechanism similar to real-life crabs using camouflage, speed, and hiding, which are common crustacean adaptations for survival.
Step-by-step explanation:
In the animated film Finding Nemo, the crab character utilizes a unique defense mechanism to evade predation by the seagulls, often exclaiming 'Mine! Mine!'. Although this is a fictional story, it does draw inspiration from real-life crustacean adaptations. Crabs in nature often use camouflage, speed, and hiding in crevices as survival tactics to escape from predators. In the case of the film, the crab uses swift movements and potentially the shell as a shield to protect itself, simulating real-life defensive behaviors of crabs.