The river water is naturally saline but varies from almost fresh to more saline then seawater.

Holes in the reef allow fresh seawater to flow through, preventing stagnation.

It closed off the shrimp ponds and created a series of reservoirs that fresh seawater is pumped through before it reaches the ponds.

It stood on the deck now, full of fresh seawater.

Electrical upwelling pumps continuously pump fresh seawater into the bags, and portable liquid oxygen tanks are used to provide oxygen to the cultured fish.

Try mixing a gallon of fresh seawater, and test for an increase in nitrates.

But as this extremely cold brine leaves the sea ice, it freezes the relatively fresh seawater it comes in contact with.

Jones is still in Funland, but he has a bigger tank, with fresh seawater trucked in once a week.

The engine(s) get required cooling from liquid-to-liquid heat exchangers connected to fresh seawater or divertible to recirculate through tanks of seawater in the engine room.

Inside the tank, which was filled with fresh seawater, was a very old dolphin.