Need a date? Just wave.

Here is a great video put together by the New York Times explaining how female fiddler crabs not only prefer males with larger claws, but also with claws that wave faster. This is based on work by Australian researchers who used robot claws to wave faster or slower. Waving is part of fiddler-crab courtship. So remember, the next time you’re in a bar or the grocery store and you see someone you’d like to court, wave your little claw off!