A Manta Ray with Remoras
Any of several marine fishes of the family Echeneidae, having on the head a sucking disk with which they attach themselves to sharks, whales, sea turtles, or the hulls of ships.* They don’t just get a free ride and free food. It’s a symbiotic relationship as they, in turn, remove parasites from their bigger buddies.
[Photo: medu flickr.com/photos/medu/ ]
*Latin, delay (from the belief that they could slow ships down), from remorārī, to delay : re-, re- + morārī, to delay (from mora, delay).