Fear smells like sugar. At least that's the case for zebra fish.
Females can activate their testes and deactivate their ovaries.
Do cats' movements when they play with toys reflect how they would hunt in the wild?
Find out which fish will survive best in your little fishbowl!
Fish have been eating plastic in the Great Pacific Garbage Patch. This has scientists concerned about long term effects on the environment.
There are lots of good reasons to make fish a regular part of your diet. But rising mercury levels in aquatic ecosystems are worrying scientists.
In mammals, the sex of a baby is determined by the chromosomes it inherits from its parents. But, the combination an animal inherits can be quite different.