Dwindling natural habitats are causing a significant decline in certain seahorse species. To bolster populations, researchers in Australia are building seahorse hotels and leaving the lights on.

The anatomical hippocampus was allegedly named for its resemblance to ... and are at high risk of being picked off by predators such as crustaceans and larger fish. These upright fish have a dorsal ...

These fish are completely transparent when they ... that this brain region is a functional analog of the mammalian ...