Some ships cook threw food waste overboard most probably.

it could evoke imagery of something sour or unexpected juxtaposed with the calming or vast nature of the sea.

Make a caipirinha 🍹

Someone was tanning fish for a ceviche 😋

Mermaid trap

That the no-coiners are salty and sour.

It means you should have fried fish for dinner tonight.

Beach Party!

Make lemonade and enjoy by the sea!

sea is already salty , you found lime

time to get tequila 😉