Lobsters is a British documentary film made in 1935, released in 1936, about lobster fishermen in the port of Littlehampton, and is one of the first aquatic films ever made.

Hungarian-born László Moholy-Nagy spent several weeks getting to know the fishermen and their families, which had a long history of fishing for lobsters. Moholy Nagy also got to know the local community and listened to their dialect.
Wikipedia

BBC article - When the Bauhaus came to Sussex 

From seabed to seafood restaurant, this charming short documentary follows a band of intrepid Sussex fishermen as they venture out to sea to lay their lobster pots. The action moves below the waves for some fabulous underwater scenes illustrating the life cycle of this "most pugnacious creature", as the endearingly plummy narration puts it. A jaunty score by Arthur Benjamin adds to the fun.

The quirky approach to the subject and beautiful photography are due in no small part to Bauhaus artist László Moholy-Nagy, who was commissioned to work on the film (with co-director John Mathias) after fleeing to Britain from Nazi Germany in the mid-1930s.
BFI

Watch Lobsters (15 mins) for free on the BFI Player.

Photo courtesy of Littlehampton Museum