Freshwater clams filter food and nutrients out of the water. If they are in an aquarium, their diets can also include invertebrate food to supplement their natural food intake. More »

Freshwater clams can be eaten, but it is not advisable to eat them as they can be toxic. Many different species of clam inhabit Ontario's lakes and rivers and were eaten for centuries by Native Americans, especially when... More »

www.reference.com Food Food Facts Meat, Poultry & Seafood

Clams are filter feeders that pump water through their bodies to catch microscopic organisms, such as plankton and algae. This is done using the siphon, a long appendage connected to the main body of the clam. The siphon... More »

Diatoms rely on the process of photosynthesis to make food, although a few diatom organisms may rely on floating nutrients found in their habitat. Photosynthesis is the process of taking sunlight and turning it into ener... More »

Seaweed absorbs nutrients from the water and utilizes energy from the sun for photosynthesis. All seaweed species are simple plants and have no use for conducting tissues or roots, although some species anchor themselves... More »

According to A-Z animals, barnacles are primarily filter feeders that collect microscopic particles of food from the water column. These food particles can be comprised of plankton or bits of organic debris. More »

www.reference.com Pets & Animals Marine Life

Freshwater eels eat small fish, worms, and crustaceans. Most eels are carnivores or meat eaters. They may also eat frozen fish food. More »