We often think of the ocean as a pretty serene, lovely place to relax. But it turns out there's quite a racket going on under the waves, and some of the culprits are not the animals you'd expect!

Howcast - Learn how to pick equipment from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn how to do a forehand push from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn how to do a backhand block from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn how to do a backhand loop from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn how to do a forehand smash from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn how to do a backhand smash from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn three tips to improve your ping pong serve from table tennis pro Tahl Leibovitz in this Howcast video.

Howcast - Learn how to serve from table tennis pro Tahl Leibovitz in this ping pong video from Howcast.

Howcast - Learn about Chris Awong of New York City Badminton in this Howcast video.

Howcast - Learn how to do a long serve from New York City Badminton's Chris Awong in this Howcast video.

Howcast - Learn how to do a backhand overhead clear shot from New York City Badminton's Chris Awong in this Howcast video.

Howcast - Learn three doubles techniques from New York City Badminton's Chris Awong in this Howcast video.

Howcast - Learn how to grip your racket properly from New York City Badminton's Chris Awong in this Howcast video.

Howcast - Learn what badminton is in this Howcast video featuring New York City Badminton's Chris Awong.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to serve faster in this Howcast video.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to hit an overhead smash in this Howcast video.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to hit a backhand volley in this Howcast video.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to hit a forehand volley in this Howcast video.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to improve your tennis backhand in this Howcast video.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to hit a tennis ball with topspin in this Howcast video.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to improve your tennis forehand in this Howcast video.

Howcast -Learn how to prevent tennis elbow from tennis pro Angelina Zdorovytska in this Howcast video.

Howcast -Learn how to practice tennis match etiquette from tennis pro Angelina Zdorovytska in this Howcast video.