<a href=showthread.php?s=&postid=6402633#post6402633 target=_blank>Originally posted</a> by Gonodactylus
It is definitely a squillid, but I can't make a positive id without seeing more detail. My guess would be Squilla empusa or Gibbesia neglecta. How many spines make up the raptorial dactyl. Five is diagnostic for G. neglecta.
A reef tank is not a good environment for a squilid. These are nocturnal animals that burrow in mud.
Roy