Aplocheilus dayi
Encyclopedia
Aplocheilus dayi is a species of killifish
Killifish
A killifish is any of various oviparous cyprinodontiform fish . Altogether, there are some 1270 different species of killifish, the biggest family being Rivulidae, containing more than 320 species...

. The species is a good size, but it gets attacked by other killifish that are smaller. Males and females have a black dot at the rear end of the base of the dorsal fin
Dorsal fin
A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fishes, marine mammals , and the ichthyosaurs...

. The females lay 50-150 eggs.
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