Enjoy five days' worth of comprehensive daily lesson plans, engaging activity worksheets, graphic organizers and more!

The giant freshwater stingray may be the ... The rays have also been targeted for the burgeoning aquarium trade, though it is now illegal to fish for stingrays in Thailand.

This story appears in the April 2017 issue of National Geographic magazine. Hundreds of millions of people worldwide would lack their prime source of protein without freshwater fish. Yet the lakes ...

All oscar fish have the same care requirements, but these varieties are guaranteed to make visitors want an aquarium of their ... winding over a dark blue background. The coloration is striking ...

DESCRIPTION: Freshwater mussels are bivalve mollusks that have a two ... The glochidia must attach to the gills of a host fish or salamander to complete development. Some mussels produce lures to ...

In an Australian first, researchers have described a new species of 15-million-year-old fossilized freshwater fish, Ferruaspis brocksi, that shows preserved stomach contents as well as the pattern ...

All oscar fish have the same care requirements, but these 15 varieties are guaranteed to make visitors want an aquarium of ...