Soft Shell Crabs

Sometimes, we just eat whatever we know without thinking.

Went to Swensen the other day on my own to have a meal. They have the Disney menu! Haa just when I though I would like to stay in Disneyland resort for a day. =)
Anyway I had a chili crab soup with soft shell crabs. Something like that.
While biting into one of the crabs, it struck me: if it has a soft shell, how is it going to defend itself against predators? What is it defense mechanism?
The ignorant me found the answer here : http://en.wikipedia.org/wiki/Soft-shell_crab
soft-shell crab are crabs in the process of molting.

Tidbits for the month. Feel free to share!