“Back it up!”

A new poster celebrates biodiversity of these freshwater crustaceans.

Crayfish

We've all heard of lobsters having rare colors that vary from the typical boring brown. About 1-in-2 million lobsters is blue — but half blue, split right down the middle? Apparently at 1-in-50 million, they're not even the rarest. That title goes to albino lobsters, at 1-in-100 million.

Two toned brown and red lobster.