The number of fish you can have depends on the size of the fish and the amount of live rock(hiding places) you have. I have a coral beauty that has had no problems in my aquaium for almost a year. I have a 130 gal with a sailfin tang, lunar wrasse(will eat your shrimp), mated pair of clarkii clowns, damsel, and a med size snowflake moray(also a shimp eater). If you want to keep your shimp stay away from triggers, large wrasses, eels, puffers...these are some of the main ones but there are always exceptions...Hope I help a little.