“The data, published in Biology Letters, showed that during certain dives, after the seals swam to a depth of about 500 feet, they leveled off, turned over on their backs and coasted slowly down, rolling and yawing slightly as they descended. This slow phase lasted on average about 10 minutes.

Dr. Mitani said the seals occasionally even struck bottom without any apparent reaction — an indication that they might have been sleeping.”

I think that this article is really cool. I think its great that they are in such a deep resting state that they actually hit bottom and don’t wake up. It’s also really interesting to me that the data is actually in 3 dimensions. It’s a fascinating to me that we have the technology to do that.

It also reminds me of just how little we know about our oceans when we don’t even know how these huge ocean-faring animals sleep. We have so much more to know.