freshwater

adjective

1. of or living in water that is fresh or not salt: freshwater fish.
2. accustomed to fresh water only, and not to the sea: a freshwater sailor.
3. small, provincial, or little known: a freshwater college.
4. Obsolete. untrained or of little experience.

noun (modifier)

1. of, relating to, or living in fresh water
2. (esp of a sailor who has not sailed on the sea) unskilled or inexperienced
3. US small and little knowna freshwater school

1. Consisting of or living in water that is not salty.