WordNet
n. flesh of fish from the sea used as food
Wikipedia
Saltwater fish are fish that spend some or all of their lives in salt water such as oceans or salt lakes, generally with a salinity of more than 0.05%.
Usage examples of "saltwater fish".
When the tidal marshes drained again, it spent the other half of its day as a high and dry hill firmly joined to the mainland once more, but surrounded by treacherous bogs, pools of brackish water, and long, landlocked oxbow lakes where saltwater fish swam in surprised dismay to find themselves cut off from the sea, easy prey to the thousands of waterfowl and wading birds and canny swamp foxes living in the marshlands.
But this particular day I didn't have any luck at all in three hours, which shows that saltwater fish are as unpredictable as the freshwater kind.
The island attracted saltwater fish into its subterranean tunnels—.
Sometimes we're hungry, and the only thing available is saltwater fish.
Not only because this gold model was found deep in the interior of Colombia and artists would never have seen a saltwater fish, but also because one cannot imagine a bird with such geometrical wings and high vertical fins.
Yet, they demand saltwater fish, won't use the fish from a nearby lake.