Remoras (family Echeneidae) are ray-finned fish that are known to attach themselves to large marine animals, such as whales, ...

While skin bone plates are well studied in crocodylians (shown here in a gharial, in purple), their presence in lizards and ...

The remora often latches on to the exteriors of larger marine creatures. But sometimes it travels in a more intrusive spot: ...

The study also points to environmental conditions as another factor behind the evolutionary success of crabs. The researchers ...

In this eye-opening talk, fish paleobiologist Lauren Sallan explains how one of Earth’s most devastating mass extinctions reshaped life on the planet. Around 359 million years ago, nearly 96% of fish ...

Butterfly fish feeding on a coral reef. The ability to bite food off hard surfaces, such as coral, evolved about 50 million years ago and led to the rapid formation of new species of fish on coral ...

Get your news from a source that’s not owned and controlled by oligarchs. Sign up for the free Mother Jones Daily. In the world’s waters, fish are making a quiet, biological retreat. The once simple ...

The Amazon molly is an evolutionary enigma: an all-female fish that reproduces by cloning itself. Because it doesn’t mix its DNA with a mate’s, Darwinian logic holds that harmful mutations should pile ...

When an Amazon molly says she doesn't need a man, believe her. Every single one of these small fish, found in freshwater streams in Mexico and Southern Texas, is female, and reproduces exclusively ...