Simplify the following text for a Grade 7 native English-speaking person.
Original: The baleen whales , also called whalebone whales or great whales , form the Mysticeti , one of two suborders of the Cetacea ( whales , dolphins , and porpoises ) . Baleen whales are characterized by having baleen plates for filtering food from water , rather than having teeth .
Simplified: Baleen whales do not have teeth , except as embryos .