Once they acclimate, the cheeklined Maori wrasse may display combative tendencies, occasionally nipping or chasing newly introduced fish tankmates. No more than one Maori wrasse of the same species should be kept per aquarium, since fighting is likely to occur in aquarium confines. If you want to keep to Cheilinus spp. in the same aquarium, introduce them simultaneously and provide a lot of hiding places. Species that are different in shape and color will be more likely to get along than similar forms. Some Maori wrasses may also display aggression toward similarly shaped wrasses.