Killifish, or egg-laying toothcarps, are known for their ecological adaptability and species diversity. Two families of killifish exist in Europe today: the highly species-rich Aphaniidae and the ...

Every year, the aquatic animals die off when the swamp dries up, leaving their eggs behind to hatch when the rains return.

A critically endangered new species of killifish sampled from an ancient forest in Kenya in 2017 and 2018 has been described ...

Female turquoise killifish normally live about 20 percent ... The researchers found that the female fish without eggs produced less of the hormone estrogen. The lower estrogen levels caused ...