Robuta

https://www.animaldiversity.org/accounts/Mysticeti/specimens/

Mysticeti (baleen whales) | SPECIMENS | Animal Diversity Web

animal diversity web baleen whales mysticeti specimens

https://scienceblogs.com/tetrapodzoology/2010/10/18/baleen-whale-laryngeal-sac

Pouches, pockets and sacs in the heads, necks and chests of mammals, part III: baleen whales |...

pouches pockets sacs heads necks