Hey, is there something on my forehead? A large (approx. 3 ft. long) remora atop a manta. The remora has a suction cup on top of its head, so when it rides on top of its host, it actually has to ride upside down (like this!). It is unclear whether remoras attach to large pelagics like mantas for protection from predators or in hopes of scavenging food...or both. This remora has some passengers of its own; the silver "spots" are actually some type of sea-lice-like parasite that could be seen scurrying around his body as he passed by!
From Socorro - Nov 2010