Alexander Semenov is a marine biologist, specializing in invertebrates.
He’s the head of the divers’ team at Moscow State University’s White Sea Biological Station where he organizes and manages all sorts of work, often diving in harsh conditions.
The video clip you’ll find below is perfect proof that Semenov loves what he does as much as the sea itself.

During one of his dives under the ice in the White Sea in Russia, Semenov recorded a creature known as the sea angel.
The high-quality footage reveals the tiny sea slug’s beauty as well as Semenov’s incredible skill controlling the camera.