Cuckoo catfish may be the worst parents ever. Rather than raising their own cannibalistic offspring, they force other fish species to raise them in their own mouths. But how do they do it? New ...

If you're a male African cichlid, it pays to be a brawler. A new study finds that female fish get a reproduction-related charge when their preferred mate wins a fight against another male. When her ...

If you're a male African cichlid, it pays to be a brawler. A new study finds that female fish get a reproduction-related charge when their preferred mate wins a fight against another male. When her ...

Eight fascinating animal species, such as Darwin's frog and mouthbrooding cichlids, exhibit unique reproductive strategies where males carry fertilized eggs in their mouths until they hatch. This ...

Some fish really know how to swim to the top. Researchers have found that within minutes of recognizing a social void, a lowly cichlid can alter its looks and behavior to ascend to the dominant spot ...

Appearances can be very deceptive. Look closely at brown striped lake snails and you may spot one that is actually a fish. Even experts can be fooled. Shun Satoh of Osaka City University, Japan, found ...