It's a species overload in this week's episode of Wild Oceans … the cast includes mushroom coral, redtoothed triggerfish, gobies, oriental sweetlips, a devil scorpionfish, cleaner wrasse, and even a mantis shrimp doing a little housekeeping.<br /><br /><p>Dive trips kindly sponsored by <a href="http://www.rayadivers.com/" target="_blank">Raya Divers</a>, Thailand</p>

Up close with zebra sharks and a huge octopus

Oceans cover 71 percent of the Earth's surface - that's a lot of space to explore! From estuaries to coral reefs and kelp forests, Earth Touch's underwater crew is telling the stories of the deep blue - one extraordinary dive at a time