We visited a tropical fish breeding flea market packed with koi, cichlids, discus, and more. Local breeders brought out some incredible specimens, from vibrant discus to high quality koi. Tank setups, ...

"It takes a village to raise a child" doesn't apply merely to humans. Many species of mammals, birds, fish, and various invertebrates have evolved complex social care systems known as cooperative ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have uncovered evidence of fish mating with species different from their own—a process that can lead to the ...

Through a series of prosocial choice tasks, researchers reveal prosocial and antisocial characteristics in male convict cichlid fish. The fish distinguish between female breeding partners, unknown ...

Fish will mate with a species outside their own if the male's colouring is attractive enough or if the female can't see him properly, according to new research. Such 'mistakes' in mate choice can lead ...

You’re considering new fish for your home aquarium, but all you see in your local pet store are the usual guppies, tetras, and small cichlids. You want a more unusual fish that stands out from the ...