seadog

noun9

1. •
   A sailor accustomed to the sea.

   • The old seadog knew the storm was coming long before the rest of the crew were aware of it.
2. •
   A pirate.
3. •
   (informal) Synonym of sea puppy.

   • Sea Dogs (Otherwise known as Harbor Seals) — 2023
4. •
   A dogfish.
5. •
   A fogbow, as seen by mariners.
6. •
   A charge resembling the talbot but with scales, webbed feet and a broad tail.
7. •
   An omen of bad luck.
8. •
   A white-topped wave in an estuary.
9. •
   (Scotland, no longer used) A seal, especially a harbor seal. (marine mammal)