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Enjoy these short videos that address topics in this week's readings.  Post your optional comments (no citations required) in this Discussion.  Include video title in your comment title.1. Bull Shark. Bull sharks are known man-eaters. In this short video, National Geographic goes with them to see how they hunt.  Hyperlink: http://video.nationalgeographic.com/video/shark_bull  (there may be a 20-second pause before the video starts)2. Marine Iguanas. In order to survive, iguanas have adapted to tackle the rough tropical seas. The sea lions however can't help teasing them in their death defying hunt for red and green algae.  Hyperlink: https://www.youtube.com/watch?v=tO_9zm9tsCs3.  Could we speak the language of dolphins?  For 28 years, Denise Herzing has spent five months each summer living with a pod of Atlantic spotted dolphins, following three generations of family relationships and behaviors. It's clear they are communicating with one another but is it language? Could humans use it too? She shares a fascinating new experiment to test this idea. Hyperlink: http://www.ted.com/talks/denise_herzing_could_we_speak_the_language_of_dolphins4. Diving for Sea Snakes.  Divers are looking to retrieve venom from sea snakes so they can make a breakthrough in medicine for possibly leukemia or epilepsy.  The snakes are captured and put into a net for study and a balloon is attached to a net to make it float to the top so the snakes can breathe.  Divers will then milk the snakes for their venom and use it to study for disease cures.  Hyperlink:  http://www.animalplanet.com/tv-shows/wild-kingdom/videos/diving-for-sea-snakes/5. Sea Turtles. Join Jonathan Bird for a visit to a Malaysian island known for more sea turtles than virtually anywhere on Earth. Hyperlink: https://www.youtube.com/watch?v=_44-x_gWE7Y6. TED: Why you should care about whale poo.  Whales have a surprising and important job, says marine biologist Asha de Vos: these massive creatures are ecosystem engineers, keeping the oceans healthy and stable by ... well, by pooping, for a start. Learn from de Vos, a TED Fellow, about the undervalued work that whales do to help maintain the stability and health of our seas and our planet. Hyperlink: https://www.ted.com/talks/asha_de_vos_why_you_should_care_about_whale_poo7. What in the world is a Dugong? Along the coast of Abu Dhabi, development is spilling into the Arabian Gulf, smothering the sea grass beds that nourish rare marine mammals called dugongs. Hyperlink: https://www.youtube.com/watch?v=YProaycNpHE&feature=youtu.be8. How Whales Change Climate.  When whales were at their historic populations, before their numbers were reduced, it seems that whales might have been responsible for removing tens of millions of tonnes of carbon from the atmosphere every year. Whales change the climate. The return of the great whales, if they are allowed to recover, could be seen as a benign form of geo-engineering. It could undo some of the damage we have done, both to the living systems of the sea, and to the atmosphere.  Hyperlink: https://www.youtube.com/watch?v=M18HxXve3CM9. Shark Reproduction.  In this great educational segment, Jonathan explores the reproductive strategies of sharks, explaining how some sharks lay eggs (oviparity), produce live young (viviparity) or produce eggs that develop internally (ovoviviparity).  Hyperlink: https://www.youtube.com/watch?v=BWI60arRyG410. How Marine Mammals Survive Underwater Life.  Arctic seals have adapted so well to the sea that, even though still reliant on air for survival, they can be seen performing impressive displays underwater in the attempt to keep all the females occupied.  Hyperlink: https://www.youtube.com/watch?v=UYkiRbgiwx0&feature=youtu.be11. Seabirds. This mini-documentary explores the astounding seabird colonies of the British Indian Ocean Territory. The tiny islands of the Chagos Archipelago are havens for nesting birds, and a precious resource in the vastness of the Indian Ocean. In this film, we follow conservation efforts that aim to clear the islands of invasive rodents and coconut palms to allow the natural bird numbers to recover.  Hyperlink: https://www.youtube.com/watch?v=quksfCDxbGE12. Hungry polar bear surprises a seal.  As the sea ice begins to break up in Summer, a polar bear ingeniously uses the drift ice to sneak up on a seal.  Hyperlink: https://www.youtube.com/watch?v=0mgnf6t9VEc13. How sharks affect us all.  Sharks on a world wide scale suffer under their reputation as brutal killers. They are close to extinction due to human prosecution. Ocean Ramsey (yes, that is her name) explains why they are a valuable and fundamental part of the oceans eco-systems and encourages everyone of us to help saving them... for our own good. Hyperlink: https://www.youtube.com/watch?v=UVuHuifQL8Q

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