Interesting Napping Position

While waiting for Pelicans to fly by near La Jolla Cove this morning, I watched these four Sea Lions arrange themselves in this position.

Here is something about California Sea Lions from wikipedia:

"California sea lion males grow to 850 lbs and 2.4 meters (8 ft) long, while females are significantly smaller, at 220 lbs and 2 meters (6.5 ft) long.
They have pointed muzzles, making them rather dog-like. Males grow a large crest of bone on the top of their heads as they reach sexual maturity, and this gives the animal its generic name (loph is "forehead" and za- is an emphatic; Zalophus californianus means "Californian big-head").
They also have manes, although they are not as well developed as the manes of adult male South American or Steller sea lions. Females are lighter in color than the males, and pups are born dark, but lighten when they are several months old. When it is dry, the skin is a purple color.
A sea lion's average lifespan is 17 years in the wild, and longer in captivity. By sealing their noses shut, they are able to stay underwater for up to 15 minutes."