What Exactly Is Coral?

Is it a plant or is it an animal? The answer might surprise you. Watch Catalyst on ABC iview: http://iview.abc.net.au/programs/catalyst SUBSCRIBE: http://ab.co/CatalystYouTube About Catalyst: Catalyst is Australia's flagship science documentary program, showcasing Australian and international stories that impact us all. With our exciting mix of science genres, presented by top scientists and experts, viewers are exposed to extraordinary topics, discoveries, observations, and philosophies that shape our world. The viewer will be left inspired, activated, and in awe of this extraordinary planet. Connect with other Catalyst fans: Visit the Catalyst website: http://www.abc.net.au/catalyst Like Catalyst on Facebook: http://www.facebook.com/ABCCatalyst Follow Catalyst on Twitter: http://twitter.com/ABCcatalyst This is an official Australian Broadcasting Corporation YouTube channel. ******** Contributions may be removed if they violate ABC's Online Conditions of Use http://www.abc.net.au/conditions.htm (Section 3).