new crab i saw in my tank gotta love hitchhikers

[Spyogenes]

hey i just came back from the ballgame to look in my tank and i saw this "new crab" i hadnt seen before its tiny flat white the white stick in the picture is a chopstick i used to get it outta the plant and into the open for the picture. any ideas as to what it is? is it good bad indifferent? thanks for your help incase the picture doesnt work here is the addy for it in my photo gallery http://reefcentral.com/gallery/data...titled2-med.jpg thanks again

 

[Spyogenes]

http://reefcentral.com/gallery/data/500/125308untitled2-med.jpg sry about the link still new to this stuff thanks again