Mysticeti, commonly known as baleen whales, are a suborder of whales characterized by their unique feeding system. Instead of teeth, they possess baleen plates made of keratin that filter small organisms like krill and plankton from the water. This adaptation allows them to consume large quantities of food efficiently. Baleen whales are among the largest animals on Earth, with species such as the blue whale and humpback whale reaching impressive lengths. They are found in oceans worldwide and play a crucial role in marine ecosystems by helping to regulate the populations of their prey and contributing to nutrient cycling in the ocean.