Seamonsters was a science fiction fanzine edited by Simone Walsh.
Seamonsters was published in London, England, in the 1970s. Four issues appeared, the last in August 1979.
Contributors included Chris Atkinson, Alan Dorey (Gross Encounters), Ann Looker, and Don West.
Simone Walsh and Greg Pickersgill had previously co-edited the fanzine Stop Breaking Down.
Seamonsters was the winner of the Nova Award for Best Fanzine in 1979.