in water that is fresh, salty or brackish, which is a mixture
of both fresh and saltwater.
us are cold-blooded, which means our temperature goes down
when we're in cold water, and rises in warm water.
plankton, shrimp, shellfish and, yes, we can even eat other
fish. Some of us also eat seaweeds and other plants.
we need rest. We can't close our eyes but we can slow down,
and 'sleep' by staying very still.
can tell how old we are by counting the growth rings on our
scales or earbones.