Oysters filter the water!

A demonstration of the phenomenon has been made in pictures:

Two aquariums were filled with brackish water from the Honga River in the Chesapeake Bay estuary (located on the East Coast of the United States), in one of the aquariums were placed a dozen oysters.

An hour later, the water in the aquarium containing the oysters lost its turbidity. Impressive, isn't it?

The oyster, like all bivalves, is a filter shell.

Its supply results from two actions: pumping and filtration.

This shell is a natural water filter that breathes and feeds by pumping seawater: an oyster filters an average of 10 to 15 liters of water per hour, in order to capture the microalgae necessary for its survival.