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.
1 Fish with lots of mercury such as swordfish, tilefish, and shark. Cut back on tuna and snapper to no more than one serving a week. But you can eat up to two servings of fish such as salmon, catfish, mahi mahi, and cod, along with shellfish like shrimp, crab, and scallops.  Raw fish.