Air rings blown by dolphins swimming underwater and rings of smoke emitted by jet engines are just two examples of vortex rings. These doughnut-shaped structures and their mesmerizing movement have ...

I was out on the lake this week for routine sampling when I noticed a familiar sign of summer: tiny yellow-green dots ...

Splash tetras lay their eggs outside of the water, but how do they do this, and why? Learn more about their unique ...

A strange sea creature discovered in Japan, resembling a skeletal panda, turns out to be a new species of Clavelina tunicate.

If your fish are spending a lot of time near the surface of the water, it could be normal fishy behavior, or it could be a sign that all is not well in your tank. ... Read more ...