Most cnidarians feed on whatever touches their tentacles. This can include anything from
worms, crabs, fish, protists, and even other cnidarians.
Where they live:
Cnidarians live only in evironments with water. These environments contain mostly salt water,
although some do live in fresh water.
In order to defend themselves from predators, cnidarians have only one option, to use their
special stinging cells located on their tentacles.