Granger on Film: 'My Octopus Teacher' is a compelling documentary

“My Octopus Teacher” wins the Oscar for Best Documentary Film. (Netflix/TNS)

Netflix / TNS

I’ve seen hundreds of nature documentaries but nothing like Craig Foster’s compelling, Oscar-winning underwater adventure, “My Octopus Teacher.” It chronicles his free-diving — without wetsuit or scuba gear — in the frigid Atlantic Ocean in the Cape of Storms, off the Western coast of South Africa every day for a year.

Best known for filming “The Great Dance” (2000) about the indigenous Kalahari San trackers, Foster was, admittedly, mentally depressed and physically exhausted when he started swimming in a shallow cove with a dense kelp forest.

One day, he spotted an octopus hiding in a crevice and, somehow, developed a kind of kinship with this curious creature. “A lot of people say that an octopus is like an alien,” he notes. “But the strange thing is that, as you get closer to them, you realize that we’re very similar in a lot of ways.”

An octopus is a soft-bodied mollusk with a bulbous head and eight tentacles, studded with webbed, sticky suction cups. Essentially boneless, it can squeeze through very tight, narrow passages.

The octopus survives on a diet of fish, snails, birds, crabs and lobsters. In most cases, octopuses feed at night but they’ll often capture prey during the day when it crosses their path. Octopuses are carnivorous, meaning they only feed on meat.

Directed by first-time South African filmmaker and fellow free-diver Pippa Ehrlich, along with British documentarian James Reed, it records Foster’s daily excursions, superbly photographed by Roger Horrocks (BBC’s “Our Planet,” “Blue Planet II”), whose underwater camera got up close and personal with this particular cephalopod.

It’s fascinating to see, for example, how this clever female octopus covers herself with an assortment of shells — an armoring/camouflaging device — and then outwits a predatory pyjama shark by riding on its back. Her creativity and intelligence are remarkable, enhanced by Kevin Smuts’ score.

Perhaps Foster’s identification of his personal catharsis as parallel to that of the octopus is a bit far-fetched but that’s understandable, given his obsession with her.

On the Granger Gauge of 1 to 10, “My Octopus Teacher” is an exotic, exquisite 8, a captivating documentary, streaming on Netflix.

Susan Granger has been an on-air television and radio commentator and entertainment critic for more than 25 years. Raised in Hollywood, Granger appeared as a child actress in movies with Abbott & Costello, Red Skelton, Lucille Ball, and Lassie. She currently resides in Westport.