Small Lagoon of Seawater Left Rocks After a Swell

This page is the CodyCross answer for the clue below from Transport, Group 114, Puzzle 3.

Question is: Small Lagoon of Seawater Left Rocks After a Swell

and the answer is: TIDEPOOL

Word Meaning:

TIDE POOL — Alternative form of tidepool.

Definitions from Wiktionary.