I had just gotten an emeral crab and notice when the moon light is on I notice these very tiny bugs (not amphipods) moving all over it and very fast. Are they scavengers and hitching a ride on the crab or is it a parasite that I got to worry about? They are way too small for me to take a picture. I looked all over the web and there are people that have seen these bugs but no one has ever identified them. Most people just blurr out amphipods but I know what amphipods are and they are nothing like them. They are the size of a pin point and maybe brown or reddish? Couldn't tell under moon light.