11) What type of whales are known for their complex singing?
12) Where do humpback whales typically sing their complex songs?
13) How long can a humpback whale song last?
14) What are the two types of cetaceans?
15) How do Baleen whales feed?
16) What is the longest migration of any mammal?
17) What type of teeth do toothed whales have?
18) What is baleen made of?
19) How do whales filter food?
20) What is the longest living whale?