I have 4 totally different kind of wrasses, and they couldn't care less of each other. I'm still getting 1 or 2 new species. They are the coolest, most active and pretty fishes out there, and I just adore them. A Coris, Labroides, Pseudocheilinus and Gomphosus at the moment, and a Choerodon still coming and possibly a Thalassoma.