Modifiers matching cetacean:

• underwater,
• small,
• large,
• captive,
• smaller,
• modern,
• giant,
• sized,
• toothed,
• coastal,

Simple categories matching captive:

• pet,
• vertebrate,
• cervid,
• animal,
• felid,
• mammal,
• cat,
• bird,
• penguin,
• herbivore,
• cetacean,
• carnivore,
• ungulate,