because
Rivers and rain are the two that I can think of.
Rivers,lakes.ponds,any fresh water source or there are fresh water fish breeders
It is salt water, because it is a continuation of the ocean water.
Catfish do not swim in the ocean, they are found in rivers, creeks, and fresh water ponds.
river is fresh water because it has no salt in it. ocean is salt water because of its salt content. hope this helps
All rivers are by definition fresh water unless they are very polluted. There is, however, a portion of every river that reaches an ocean that is called an estuary. this is where the fresh water coming downstream mingles with the salty tidal water of the ocean.
rain, snow, and melting ice add fresh water to the ocean, lowering the salinity there. Salinity is also lower near the mouths of large rivers. These rivers empty great amounts of fresh water into the ocean.
If you are talking about fresh water, most of it is from lakes rivers, and underground. But the most water is definitely found in the ocean.
well it can die if its a salt water shark in a fresh water lake, but if its a fresh water shark and its in a fresh water lake it will live.
Yes, yes they do!!
No ocean can dry out as the rivers keep on bringing fresh water to it.
Because of the mixture between fresh water and salt water.