Sealubber

The punster is a low person, who refers to the awkwardness of the seal’s gait by speaking of his not having his seal-legs, although a mariner—or a sealubber, as he might express it.

Source: wiktionary

I can command a ship. Perhaps I ought to be content with that. But I’d like to know a few of the things that Winthrop there knows so well. We make fun of a landlubber at sea, but he’s nothing to a sealubber ashore.

Source: wiktionary

Showing unusual ability for sealubbers when they swept the boards in both hurdle events, thereby reaping a harvest of 22 points, the Columbia Midshipmen School captured the team honors in the annual Metropolitan A.A.U. senior indoor championships, the season's opening track and field event, at the Twenty-second Regiment Armory last night.

Source: wiktionary

Now and then the old ship rocks a bit in the bow wash of a steamer outward bound for Finland and farther points; she strains at her moorings, as though eager for one last voyage. Nostalgic landlubbers, and sealubbers, enamored of the bygone days of sail, find her quite irresistible.

Source: wiktionary