Dentistry under the sea looks a lot less painful but potentially much more dangerous for the hygienist. Moray and cleaner shrimp. Photo credit to Erwin Kodiat Sand Diver and Pedersen's cleaner shrimp. Photo credit to Reef Reflections Fun fact: adorable cleaner shrimp are notable for crawling down people's throats and laying eggs in their chest! Photo credit to Michael Haas.