The ventral pleat, which refers to grooves in the skin under the mouth, is found in baleen whales, specifically in species like humpback whales and blue whales.
The ventral pleat is a grooved skin fold located under the mouth of a cetacean, such as a whale, dolphin, or porpoise. It is used to help the animal increase its intake of water when it feeds.
Cetaceans, such as whales, dolphins, and porpoises, possess a skin fold beneath their mouth called the ventral pleat, which serves the purpose of enhancing their water consumption during feeding.
