Broke out the 65 MP-E for some extreme macro last night. Kim has been setting up a salt water aquarium for the last couple of months (read about it on her blog Reefbreefs) and these guys have started multiplying like crazy.
She needed a closeup to see if they are the Ich parasite (which they thankfully aren't).
In this image, Kim is holding up a penny at the edge of the frame to give you an idea of just how small these guys are.
Technical: Canon 5D2, 65 MP-E @ 5x magnification, Stack Shot, f/11-f/16, hand held strobe.