Malachi's Cove (also known as The Seaweed Children) is a 1974 British-Canadian coming-of-age period drama film directed by Henry Herbert and starring Donald Pleasence, Veronica Quilligan and Dai Bradley.

In North Cornwall, 1880, Mally Trenglos, a tough young girl aged sixteen, collects seaweed and sells it as fertilizer for the local farmers.

[citation needed] The Monthly Film Bulletin wrote: "It's pleasing to see a modest British film avoiding the usual tired formats for U certificate entertainment, but sadly there is little dramatic conviction behind the pretty pictures of Cornish coves, cliffs and cobbles.

The flashbacks to the drowning and failed rescue attempt occur too frequently, and the performers only emphasise the uncomfortably bogus nature of the whole enterprise.

Veronica Quilligan, as the urchin heroine, looks as though she regularly has four square meals a day, while Donald Pleasence – pipe in mouth, coughing and muttering Old Cornish proverbs (all of them swiftly translated for the uninitiated) – provides some swiftly fading colour.