The Quiz: Instead of teeth, what do some whales use to eat plankton?
Beaks
Baleen
Tusks
Sticky tongues
Instead of teeth, 14 species of whales have bristle-like baleen that filters plankton and krill from the seawater. Made of keratin, baleen is similar to human fingernails and hair. Several baleen whale species also have accordion-like throats, allowing them to gulp giant mouthfuls of seawater and food.
The correct answer to this quiz is Baleen.