An example of a filter-feeding animal is a whale. Filter-feeding is a method of feeding where an animal passes water through a specialized structure to filter out small organisms like plankton, krill, and small fish.
Whales have a specialized structure in their mouth called baleen plates which act like a filter. They take in a large amount of water and then force the water back out through the baleen, trapping small organisms inside their mouth which they then swallow. This allows whales to feed on a huge amount of small organisms at once.
On the other hand, sharks, butterflies, and mosquitoes do not filter-feed. Sharks are carnivorous predators that catch their prey using their sharp teeth, butterflies are nectar feeders and they have a long tube-like structure called proboscis which they use to suck the nectar from flowers, and mosquitoes are blood feeders, where they insert their proboscis into the skin of animals to extract blood.