Evolution has so precisely honed certain specialized muscles involved in fish mating calls that the muscles are now physically incapable of much else, including any significant locomotion, biologists ...

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 ...

"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," ...

This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today. Grunions are the only fish in the ...