African killifish becomes fastest maturing vertebrate on record

Annual killifish are known to live their lives at one of two speeds: "pause" or "fast-forward." For most of the year, the tiny freshwater fish persist as diapausing embryos buried in sediments across the African savannah, much like plant seeds. When rainwater fills small depressions across the landscape, the fish must hatch, grow, mature, and produce the next generation before the pool dries up.

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