There’s a story about an aquarium where a tank full of fish was missing one fish every night. An employee lurked during the night and saw the octopus get out of its tank, steal a fish, and go back to its own tank.
Right! An octopus and a huge crab walk into a fish tank...
I believe it. Even without an octopus - Just keeping an aquarium with regular, nothing-special fish got very interesting. It’s almost as if the fish waited until we weren’t looking. We’d return to find that one was missing. They didn’t look big enough to eat each other, but...