Seals are mammals, meaning they have lungs and have to breath in ear every now and then. Being marine mammals they’ve adapted themselves to living under water by creating large lungs and creating an efficient way of using their oxygen. This way they can hold their breath for several minutes, sometimes even for over 10 minutes. But after a while they have to come back to the surface to get some fresh air.
Hi Arjen,
Why do you call this picture “Back Stroke”, because the Seal is not swimming on its back.
Peter Zwitser
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Hi Arjen,
I viewed this picture for the second time, but it’s still not swimming on its back, because you can see the almost closed eyes on top and the lower jaw where it should be when swimming on your belly.
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I completely agree. On the original picture it really looked the seal was swimming on its back, but when I posted the post, I realised I was wrong, so I quickly adjusted the title and text, but couldn’t resent the mail that you got. It is indeed swimming on its belly.
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