the answer is phytoplankton or plankton
Freshwater is less dense than seawater because it has a lower salinity, so it is more likely to float on the surface of the ocean. This is why rivers flowing into the ocean form distinct layers of freshwater on top of the saltwater.
Plankton
algae people dead fish
Yes
Plankton is the mass of mostly microscopic organisms that float or drift freely in freshwater and marine environments and Nekton are all organisms the swim actively in open water, independent of currents.
It is easier to float in a saltwater lake compared to freshwater because the higher salt content increases the water's density. This increased density makes it easier for objects, including our bodies, to float on the surface of the water.
SaltWater
You are more likely to float in salt water than in freshwater due to the increased density of salt water. The salt makes the water denser, providing more buoyancy and making it easier for objects, including humans, to float on its surface.
Organisms that float on water are called plankton. Plankton can be either phytoplankton (plant-like) or zooplankton (animal-like), and they play a vital role in aquatic ecosystems as the base of the food chain.
Saltwater
saltwater