Not all creepy things go bump in the night -- some of them swim. While you might think of fish as harmless little dudes hanging out in your aquarium, there are some ...

What has needle-like teeth so large they don’t fit inside its mouth, a huge gaping jaw that completely engulfs its prey, and lives in the depths of the ocean where sunlight can’t reach? That would be ...

Two new snake eel species discovered in Vietnamese waters, one with "robust" teeth and one with "sharp" teeth, were detailed in a research article published in the zoological journal ZooKeys on March ...

Can we examine the teeth of living fish and other vertebrates in detail, repeatedly over time, without harming them? Previously, small animals often had to be euthanized to obtain precise information, ...

The cichlid fish of Africa's Great Lakes have formed new species more rapidly than any other group of vertebrates. A new study shows that the ease with which these fish can develop a biological ...

Off the coast of Kerala, India, a trawling net caught a new species of bottom-dweller. Getty Images/iStock Photo Off the coast of India, a trawling net pulled behind a boat captured a collection of ...

Scientists found a freckled sea creature with “canine-like” teeth on giant barrel sponges in Indonesia and discovered a new species. Photo from Getty Images / iStockphoto In the crystalline waters off ...

It's not what you do, it's how readily you do it. Rapid evolutionary change might have more to do with how easily a key innovation can be gained or lost rather than with the innovation itself, ...