What's the most annoying/weirdest stowaway you've found in your tank?

[Josh]

You know, like the random starfish you KNOW you didn't buy. Or those pesky fire worms! We need to make like a Stowaway Hall Of Fame!

 

[skipm]

I found a stowaway crab one time, I knew he was a baddie because he was hairy and his claws were made for shredding meat. He was about as big around as a silver dollar when I discovered him. His appearance was similar to an emerald crab in shape and appearance with the previously mentioned differences.

Neat topic.