Dolphin fish look like dolphins but belong to the morymid family that also includes baby whales and elephant nose. These fish go well with an African theme aquarium and they are hardy and a bit aggressive. It is usually best to have live feeders on hand as these fish come wild from Nigeria and sometimes need to be transitioned to prepared foods. Like other morymids, the dolphin fish prefers a hiding place. When adapted to the aquarium it is a bit unsettling when one approaches the glass like Flipper asking for a treat.