Learn about fish from around the world. Varying species, their biology, role in the environment, human cultural significance, as well conservation issues.

Use this animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical and unique characteristics of the lake sturgeon.

Describes the physical characteristics of Daphnia, their importance as a food source for freshwater fish, their diet, life cycle, and methods of reproduction. Offers tips for how to start and maintain a colony of Daphnia that can be used...

This video segment from NOVA: "Sea Behind the Dunes" tracks the return of spawning alewife fish from the open ocean back to the freshwater streams and ponds where they were born. [3:34]

Kids learn about the brook trout. What it looks like and eats. Where do they live in fresh water?

This excellent resource from the San Diego Zoo presents extensive information on pumpkinseed sunfish including details about their habitat, physical characteristics, size, diet, family life, conservation status, and fun facts.

Everything you've ever wanted to know about vertebrate kidneys. Modules include Freshwater Vertebrates, Amphibians, Lizards and Snakes, Birds, Mammals, Marine Fishes. Resources can be used as classroom notes or supplemental materials.

In this WebQuest, you must pick a type of water habitat to create a new aquarium, choose three animals that can coexist in this habitat and design your own aquarium.