Japan is an island nation surrounded by the ocean. Fish are deeply familiar to us, yet they hold many mysteries and possibilities—from their ability to change sex depending on environmental conditions ...

In mosquitofish, of the genus Gambusia, male fish are smaller than females -- sometimes only half the size. Biologists had previously assumed that smaller male mosquitofish had at least some ...

The ocean is home to a vast array of different animals, each with its own traits. These include different forms of mating, such as parasitic mating. Parasitic mating occurs when the male physically ...

Maternal influences in fishes encompass a suite of non-genetic processes by which a mother’s size, condition and environmental history shape egg characteristics and ultimately offspring performance.

Researchers from Institute of Science Tokyo present the underlying reasons behind the evolutionary bias in reproductive strategies of egg-care species. Using 240 whole genome sequences of fish species ...

Successful reproduction presents a fundamental evolutionary paradox: the immune system must tolerate genetically foreign sperm and embryos while maintaining ...

In mosquitofish, of the genus Gambusia, male fish are smaller than females—sometimes only half the size. Biologists had previously assumed that smaller male mosquitofish had at least some reproductive ...

Parental egg-care in fish traps them in an evolutionary dead-end through the loss of the chorion-hardening system, according to scientists from the Institute of Science Tokyo. Fish have diverse ...