Sea Lions are very common aquatic creatures on the coast of British Columbia.
Divers enjoy interacting with them, although perhaps most don't get as close as this.
Note: Sea Lions are not attacking the divers when they open their mouths and feel things... divers were not hurt and clothing was not punctured.
Sea Lions are like dogs and explore things primarily with their mouths. Divers reported it felt like 'nibbling'.
Basically the same as if one was playing with a lot of very large exuberant puppies.
Also check out the following video of them feeding Wolf Eels.
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