In the ocean, you'd figure that you're either a shark, or something that's fodder for a shark to eat, right? It turns out that not even sharks are safe from sharks. While diving on the Great Barrier Reef, researchers from the ARC Centre Of Excellence For Coral Reef Studies snapped this shot of a tasselled wobbegong shark.
So far, so good.
Except for what it's having for lunch, namely a brown-banded bamboo shark. It's not even tucking into a dead shark; it's eating the other shark head first.
Australian sharks. Finest in the world. It makes me proud. [New Scientist] Image: Daniela Ceccarelli