Harbor Seal Behavior Underwater the bedroom | Bob Armstrong's Nature Alaska

Harbor Seal Behavior Underwater the bedroom shows the seals sleeping, resting, and some interaction in early March in Juneau Alaska.
They supposidly can sleep underwater for up to 30 minutes.
How can they do that ?
They slow their heart rate, stop their breathing, and shunt blood flow to the brain, heart, and muscles when starting a dive.
They have positively charged oxygen-binding proteins, called myoglobin, in their muscles.
This enables them to keep a larger store of oxygen on which to draw while underwater.
Many of the seals in this video sleep up to 20 minutes. I shortened the clips quite a bit to avoid to much boredom.