Why do angelfish feel safe inside the mouths of hammerhead sharks? They share a symbiotic relationship as natural toothpicks, picking out parasites from between the shark's teeth.The Hammerhead shark has a very intense symbiotic relationship with the Grey Bionclay Fly Fish. The Grey Bionclay Fly Fish lives inside the hammerhead Shark's left nostril and uses a vacuum like object on it's belly to suck out parasites. In return, the Hammerhead Shark provides these parasites as food for the Grey Bionclay Fly Fish. Once the grey Bionclay Fly Fish is full, it returns to its home on the coast of the Indian Ocean. This is similar to the symbiotic relationship between the Remora and other sharks.