|“||This one's pretty cool, isn't it?||”|
— Meryl, The Fish Emporium
Fish that are rainbow have color-changing properties that allows them to cycle between different colors. Although not explicitly described as a special attribute, rainbow fish cost five times more than their colored counterparts and are exceptionally rare finds in The Fish Emporium. The only fish that may be rainbow are guppies and carnivores; they cost 2,500 shells and 5,000 shells, respectively.