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Lights Off: Luminescent Siphonophore | Nautilus Live

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NAUTILUS LIVE 2014 | E/V Nautilus is exploring the ocean studying biology, geology, archeology, and more. Watch http://www.nautiluslive.org for live video from the ocean floor. For live dive updates follow along on social media at http://www.facebook.com/nautiluslive and @evnautilus on Twitter. For more photos from our dives, check out our Instagram @nautiluslive.

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Marrus orthicanna is a fascinating specimen that scientists do not know everything about. They are also rarely seen as they live in the cold deep ocean

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During World War II, submarine operators found that they could hide the submarine from the enemy’s sonar under large groups of siphonophores. The sonar waves were scattered by the soft bodies if the siphonophores.

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Marrus orthicanna can grow to be several meters in length with tentacles up to fifty Centimeters on both sides. This is a very unique creature as it is made up of several identical units, having multiple stomachs and tentacles. Marrus orthicanna is a carnivore believed to eat small crustaceans such as krill. It does this by extending its tentacles to captureand sting its prey.

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Marrus orthocanna can be found in in the Arctic 200-800 meters below the surface. The deepest its ever been observed at was around 2000 meters. It swims where almost no light penetrates and water temps are very low. It has been found in north west Pacific Ocean, Bering Sea, the Sea of Okhotsk, the north Atlantic Ocean and the Mediterranean Sea as well as other cold and deep waters.

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Marrus orthocanna is a deep sea siphanophor . It is a colonial animal composed of a complex arrangement of zooids which are mainly polyps and medusa.