Definitions for "Killifish"
Any one of several small American cyprinodont fishes of the genus Fundulus and allied genera. They live equally well in fresh and brackish water, or even in the sea. They are usually striped or barred with black. Called also minnow, and brook fish. See Minnow.
A very beautiful group of fish which can be quite hard to find.
Egg laying toothcarps. (Compare Livebearers). There are two types of Killifish, the Annuals and the non-Annuals. Annual Killifish inhabit temporary bodies of water that completely dry up during part of the year. These fish have a short lifespan and rapid growth rate, reaching maturity within a few months. They lay eggs that remain dormant until the conditions are favorable for hatching, when the rainy season returns. Their eggs are incubated by aquarists in a special way to imitate this (see Peat). Non-annuals have a longer lifespan, but most also have the ability to lay eggs that can survive a short dry season.