Filter feeders are a sub-group of suspension feeding
animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. Some animals that use this method of feeding are
clams,
krill,
sponges,
baleen whales, and many
fish (including some
sharks). Some birds, such as
flamingos and certain species of
duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered
ecosystem engineers.