Question

Which of the following animals filter feeds? dolphins fish baleen whales clams sponges

Answer 1

Animals filter feeds are those that feed the filtered foods from the water. These animals are important for water clarifying and are scientifically called ecosystem engineers. They have a filtering system, and they eat by straining tiny food, like plankton from the water, but not just that. Animals that filter food may also be some birds like flamingos and certain types of ducks. Among the offered options, animal filters feeds are all except dolphins.

Answer 2

Baleen whales filter feed. Their baleen are arranged like combs to filter the krill out of sea water. If it isn't multiple choice then clams can also be considered to feed by filtering but aren't traditionally called filter feeders (they're bi-valves).