If you've ever wondered what a sea lion tongue looks like, Seirra here can show you! She often sticks her tongue out during quiet moments—and we happen to think it's just plain adorable.

Sierra the California sea lion, "Plllffffft!"

Quiet moments for this gal are few and far between, however. You'll usually find her romping with her fellow sea lion, Zoe, or carousing with the youngsters—Leu, Flaherty, Chiidax and Kit.

Zoe and Sierra are two peas in a pod.

Sometimes the trainers engage the seals and sea lions with a little enrichment—something out of the ordinary that's fun to explore and play with. A plain old garden sprinkler works for this!

Sprinkler time

Sierra's athletic and acrobatic sides are often on full display during training sessions. Head out to the New Balance Foundation Marine Mammal Center during your next visit to check on Sierra and the rest of the rambunctious crew of marine mammals. You never know what these fast and fascinating animals will be up to!

Learn more about the marine mammal training and play:

• Speaking of tongues,  see Chacoda the harbor seal's handsome tongue
• Lindsay and Leu have been working on some pretty nifty Frisbee skills
• Paul taught Chacoda to wear a harness and he's become quite the GoPro videographer
• It's not all work and no play, the fur seal pups get to play in the snow sometimes!