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 ...

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 ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A mussel has been captured on video flapping its mantle in an attempt ...