If you ever see

...something that looks like a shallow lake on the beach (a small low area which has filled with seawater at high tide), like this example:



...you should wade in it (especially if you have little kids). They are lovely, calm places to splash, and the water is usually bathtub warm since the shallowness means sun is able to heat it quite effectively. That's what I call wonderful - a natural hot tub, within view of the ocean!