By the Sad Sea Waves
- taona: 1917
- Firenena: United States of America
- Genre: Comedy
- Studio: Rolin Films
- Keyword: rescue from drowning, silent film
- tale: Alfred J. Goulding
- Cast: Harold Lloyd, Harry 'Snub' Pollard, Bebe Daniels, Frank Alexander, William Blaisdell, Sammy Brooks