Returns upstream every year to spawn
Not related to the eel
Eels can be a mere few inches long to 13 feet!
Large species can swallow whole salmon
The crappie is one of the most popular freshwater fish in North America.
Some species of aquatic turtles can get up to 70 percent of their oxygen through their butt.
A female zebra mussel can deposit 30,000 to 1,000,000 eggs each year!
The sea eagle tends to mate for life with a single partner
Some gulls are capable of using tools
Some Goby species are toxic.