A biologist at Washington University in St. Louis has shown that for some fish species, females prefer males with larger sexual organs, and actually choose them for mating. That does not exclude males ...

In many fish species body size plays an important role in sexual selection. Large individuals are preferred mating partners because they can enhance offspring survival by providing better quality ...

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PENYABANGAN, Indonesia — It took a broken air conditioner for Tom Bowling to figure out — after nearly eight months of failure — how to breed the coveted pink-yellow tropical fish known as blotched ...

"Each spring, all adults of the species migrate to one site, the Colorado River Delta in the uppermost portion of the Gulf [of California], to form one spawning aggregation of several million fish," ...

Climate change may be depriving juvenile fish of their most crucial early food source by throwing off the synchronization of when microscopic plants known as phytoplankton bloom and when fish hatch, ...

A breeding colony of 60 million fish has been discovered in Antarctica’s ice-covered Weddell Sea – a unique and previously unknown ecosystem that covers an area the size of Malta. The fascinating find ...

Walk into any pet or aquarium store, and you’re going to find clownfish. That orange-and-white-striped Nemo is practically synonymous with saltwater aquariums, and it’s one of the first fish new ...

SEATTLE — No one knows for sure what caused a humming noise that annoyed residents of the West Seattle neighborhood on Puget Sound, but one theory is the buzz was a fish mating call. Noise abatement ...