Animals with ultraviolet color patterns can be found all over nature. Here’s what we know about what purpose these patterns ...

Tetras are colorful, active, and easy to care for if you know what they need. This guide covers everything from tank setup ...

The big, blue jellyfish washing up on Florida beaches this week actually aren't jellyfish at all. Here's what to know about ...

Bright pink eggs spotted in eerie green water might look beautiful but they belong to an invasive species with a toxic twist.