The samurai crab's shell resembles the face of a samurai warrior. A popular theory proposed that fishermen spared the crabs with the most face-like shells, throwing them back instead — selectively breeding the species to resemble a scowling samurai. While a neat idea, it's unlikely to be true.

Skeleton shrimp are skeletally thin and often have ghostly transparent bodies. They grasp algae with their spindly rear legs, while their front legs form large "claws" used for grooming, defence, and capturing prey. Luckily, they only grow to a couple of centimetres (~1 inch) long.