How do oysters barnacles and clams feed?

Oysters are filter feeders, meaning they use their gills to extract food particles from the water. The gills are covered in tiny cilia, which help to trap food particles. The food is then passed to the oyster's mouth, where it is ingested and digested.

Barnacles:

Barnacles are also filter feeders. They use their cirri, which are long, feathery appendages, to catch food particles. The food is then passed to the barnacle's mouth, where it is ingested and digested.

Clams:

Clams are also filter feeders. They use their gills to filter food particles from the water. The gills are covered in tiny cilia, which help to trap food particles. The food is then passed to the clam's mouth, where it is ingested and digested.

In addition to filter feeding, some clams also burrow into the sand or mud and feed on detritus, which is decaying organic matter.