| Hello everyone, well its nice to know that this is a good sign. I also just setup my tank a little more then 1 month ago and I saw these guys crawling over the tank. I would like to naturally keep them in check but I'm curious as to what natural predator of copepods/amphipods are available to Marine Aquarium with aggressive fish such as the ones within my tank (the list of my inhabitants is below in my signature). If anyone has any suggestions please let me know. My girlfriend would love if a Mandarin Goby could be added safely. :-) | 
