I don't know how you start a thread about a "viral" sea otter, and not include any videos. This is a different story, of "Sammy," the baby seal, in San Diego: Here is the sea otter, who is operating much further north, in the Santa Cruz area. These creatures typically avoid humans. I saw one report which mentioned this incident, alongside mention of the Killer Whale story, from Spain, of their ramming boats. In both cases, the motivation is unknown, and has been speculated (of the whales) as being anything from "playing," to seeking revenge, for a boat propeller killing one of their family. It should be noted that this sea otter bites chunks out of the boards that he commandeers, & that a sea otter bite, would be rather unpleasant. The story below, however, I think offers a relevant clue: the sea otter had been raised in captivity because its mother had been captured, for exhibiting the same behavior.
Catch a Wave by The Beach Boys Catch a wave and you're sitting on top of the world Don't be afraid to try the greatest sport around (Catch a wave, catch a wave) Everybody tries it once Those who don't just have to put it down You paddle out turn around and raise And baby that's all there is to the coastline craze You gotta catch a wave and you're sittin' on top of the world Not just a fad cause it's been going on so long (Catch a wave, catch a wave) All the surfers going strong They said it wouldn't last too long They'll eat their words with a fork and spoon And watch 'em they'll hit the road and all be surfin' soon And when they catch a wave they'll be sittin' on top of the world Catch a wave and your sittin' on top of the world So take a lesson from a top-notch surfer boy (Catch a wave, catch a wave) Every Saturday boy But don't treat it like a toy Just get away from the shady turf And baby go catch some rays on the sunny surf And when you catch a wave you'll be sittin' on top of the world Catch a wave and you'll be sittin' on top of the world