Because their numbers started to sea star.
What do you call a starfish that has lost all of its arms?
A starfish that has starfish hands.
Why did the starfish get kicked out of the starfish club?
Because he was being shellfish.
What do starfish use to write with?
Their pen-ta-cils!
Why did the starfish get in a boat instead of a car?
Because he was a little tide-ed up with work.