Fortunately, their micro-traeki rings provided the human swimmers with all the air they needed.

In the moderate waves, a good human swimmer could make it easily.

For a human swimmer, to step on one of these almost invisible bottom-dwellers is to experience perhaps the worst possible pain.

The extraordinary animals seem to have the ability to size up a human swimmer quickly and appear to be shrewd judges of character.

It didn't look like the movements of human swimmers.

The mermaid flirted for a moment completely beneath the surface, and up again, much as a wholly human swimmer might have done.

For example, a beach may have a shark net around it to prevent sharks from attacking human swimmers.

Another camp helps teach dogs rescue skills, including teaching a dog to tow a troubled human swimmer to shore.

Ducklings bob like corks, objects of greater solicitude to the human swimmers than they seem to be to their mothers.

Dolphins have also been known to aid human swimmers in need.