Gardneri KillifishThis species is also known as Gardners Killi and blue lyretail and the commonly available aquarium forms are perhaps among the best choices for those new to keeping killifishes being relatively hardy, colourful and easy to breed. Males can be aggressive towards one another but provided the aquarium contains sufficient refuges a group can normally be maintained together. Fish Size Guide: The 'Maximum Size' outlined below is the length this fish can