Uploaded January 2012 | Updated September 2026, 2 weeks ago
oneworldoneocean.org -- In this episode of OCEAN HEROES, Anna Cummins and Marcus Eriksen of 5 Gyres Institute explain: WHAT IS A GYRE? Learn more about how you can help protect our oceans at http://oneworldoneocean.org.
oneworldoneocean.org -- In this episode of OCEAN HEROES, Anna Cummins and Marcus Eriksen of 5 Gyres Institute explain: WHAT IS A GYRE? Learn more about how you can help protect our oceans at http://oneworldoneocean.org.
![Meet The Greenland Shark! [HD]](https://i.ytimg.com/vi/hFPOCh6wJKQ/mqdefault.jpg "Meet The Greenland Shark! [HD]
http://oneworldoneocean.org Find out more about sharks like this and other Arctic creatures at our website!
For more information about polar bears and Arctic wildlife, see the new IMAX® film To The Arctic 3D opening in select IMAX Theatres starting April 20, 2012. To The Arctic 3D is a MacGillivray Freeman Film from Warner Bros. Pictures and IMAX Corporation. Presented by One World One Ocean Foundation.")
![Cuttlefish Fights For Spawning Rights [HD]](https://i.ytimg.com/vi/kVAgXupD-Do/mqdefault.jpg "Cuttlefish Fights For Spawning Rights [HD]
To learn about the giant cuttlefish spawning aggregation and the experience of seeing and filming them, check our blog http://www.oneworldoneocean.org/blog/entry/ocean-stemulation-from-squid-skin-to-smart-clothing
Giant cuttlefish (Sepia apama), photographed by renowned underwater filmmaker Howard Hall, gather off of Whyalla, South Australia to spawn. Males display mating colors and compete aggressively to mate with females.
The giant cuttlefish is the worlds largest cuttlefish species. They gather in large numbers to mate. During that time, large males compete aggressively for females and small males tend to approach potential mates sneakily. They can mate only once in their lives and the females will die not long after laying eggs.
Cuttlefish and other cephalopods are remarkable for their ability to change their skin color and texture.
Chromatophores, cells containing pigment, can rapidly expand or contract to reveal different colors and patterns. To learn more about how cuttlefish change their skin color, visit this page: http://www.oneworldoneocean.org/field-reports/entry/diving-with-the-worlds-largest-cuttlefish")
