(A quick search finds an average sea depth of 3,682 meters, and a "mean elevation of Earth is −2441 m relative to the WGS84 spheroid") I think that in SF there

(A quick search finds an average sea depth of 3,682 meters, and a "mean elevation of Earth is −2441 m relative to the WGS84 spheroid") I think that in SF there were a few water covered worlds, mostly unmemorable except perhaps for a story about a very very long surf ride, by Zelazny I believe. More recently Neal Asher made some good hay with a waterworld featuring interesting monsters and a very weird biology - https://www.panmacmillan.com/authors/neal-asher/the-skinner/9781509868438 https://www.panmacmillan.com/authors/neal-asher/the-skinner/... - which also affects humans roaming around in sailing ships.