My family very much wants a triggerfish. We have a 55 gallon tank and we want to add corals soon. The fish in our tank are: true percula clownfish, yellow watchman goby, royal gramma, 2 peppermint shrimp, a red fromia starfish, and 2 emerald crabs, but one we haven't seen for about 2 weeks. One fish we are going to get is the yellow tang. Can we get a triggerfish? And what ones can we get?