When the tide is in, a beach may be covered with water. When the tide goes out, tiny pools of water, often with a few sea creatures in them, are left among the rocks. "Get all the cargo aboard....
The Forsaken Merman
Now the great winds shoreward blow, Now the salt tides seaward flow; Now the wild white horses play, Champ and chafe and toss in the spray. from The Forsaken Merman by Matthew Arnold
Sea-Fever
> I must go down to the seas again, for the call of the running tide Is a wild call and a clear call that may not be denied. from Sea-Fever by John Masefield > Where shall we adventure, to-day...
High tide, low tide
It is early in the misty morning. You are standing on a cliff that overlooks the sea. Gulls soar overhead, calling to one another with shrill cries. Below you, the gray sea crashes against the shore....