Even though the mantis shrimp and clam are in an aquarium, the same merciless rules apply. But why are they fighting, and why does the mantis shrimp have a bone to pick with the unassuming clam? Watch ...

“Japanese mantis shrimp can easily be confused with a native ... they are aggressive and “can punch their way through aquarium glass,” officials said. The Japanese mantis shrimp was first ...