Lobsters Have Two Stomachs
Just in case peeing from their faces isn't unusual enough for you, lobsters have some other unique anatomical characteristics. A lobster's eyes at the base of its antennae detect light and shadows, but not colors or images -- most of its seeing is done with its three pairs of antennae. The large pair is used for feeling around and the smaller two pairs help it navigate via smell [source: Lobster Conservancy]. An appendage between its eyes called a rostrum often gets mistaken for a nose, but it's just there to protect the eyes during fights.
And that's not all. Lobsters have two stomachs. One is located in what we'd consider the lobster's head -- right behind its eyes. This stomach contains teeth-like features (called a gastric mill) that are used to crush the lobster's food. Once the food is fine enough, it passes to the other stomach. Most of a lobster's abdomen is taken up by a digestive gland that serves as the filtration system -- sort of like your liver. Called the tomalley, it turns green when cooked, and some consider it a delicacy [source: Lobster Conservancy].