Desalination (also spelled desalinization) is the process of creating fresh water by removing saline (salt) from bodies of salt water. There are varying degrees of salinity in water, which affects the difficulty and expense of treatment, and the level of saline is typically measured in parts per million (ppm).
Catfish are a close second choice for best eating fresh water fish of Florida. It seems like there are more and more varieties of catfish available in Florida every yearâblue, brown bullhead, flathead, yellow bullheadâand who knows what catfish species is next to inhabit our rivers and lakes.
Which Fish to Eat & Which to Avoid. 1  Avoid large species fish that tend to be high in mercury. 2  Choose smaller fish that are at lower risk for mercury contamination. 3  Avoid fish that are not responsibly farmed or caught.  Choose fish that are responsibly raised or caught.