Answer the following question given this paragraph: 

Sea otters are known for being playful and frisky. They are serious eaters, however! A major part of a sea otter's diet are echinoderms, such as sea urchins. They manage to eat the soft part of the sea urchins while avoiding the huge sea urchin spines.


Q: What type of animals are known for being playful and frisky?


A:
sea otters