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.
At the same time as Seamonsters was being published, Simone Walsh was also writing a regular column for Greg Pickersgill's Stop Breaking Down.
Seamonsters was the winner of the Nova Award for Best Fanzine in 1979.