The Deepest Crinoids

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Japanese researchers recently set a record with the deepest in-situ observation of a criniod. In the words of the authors,

Previous records of stalked crinoids from hadal depths (exceeding 6000 m) are extremely rare, and no in-situ information has been available. We show here that stalked crinoids live densely on rocky substrates at depths over 9000 m in the Izu-Ogasawara Trench off the eastern coast of Japan, evidenced by underwater photos and videos taken by a remotely operated vehicle.

Oji, T., Ogawa, Y., Hunter, A., & Kitazawa, K. (2009). Discovery of Dense Aggregations of Stalked Crinoids in Izu-Ogasawara Trench, Japan Zoological Science, 26 (6), 406-408 DOI: 10.2108/zsj.26.406

[googlemap lat="34.27083595165" lng="141.85546875" width="500px" height="500px" zoom="4" type="G_SATELLITE_MAP"]Izu-Ogasawara Trench[/googlemap]

Dr. M (1623 Posts)

Craig McClain is the Assistant Director of Science for the National Evolutionary Synthesis Center, created to facilitate research to address fundamental questions in evolutionary science. He has conducted deep-sea research for 11 years and published over 40 papers in the area. He has participated in dozens of expeditions taking him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses mainly on marine systems and particularly the biology of body size, biodiversity, and energy flow. He focuses often on deep-sea systems as a natural test of the consequences of energy limitation on biological systems. He is the author and chief editor of Deep-Sea News, a popular deep-sea themed blog, rated the number one ocean blog on the web and winner of numerous awards. Craig’s popular writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.





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3 comments on “The Deepest Crinoids
  1. Rats! The Crinoidea beat the depth record for black corals (8600m, Bathypathes patula). I am incensed! Tell me, who was clipped from the picture? Rocky substrates at 9000m? Boulders? What’s going on here?

  2. The deepest trawled crinoids were by the R/V: Vityaz in the same trench at 9700 meters. They are classified as a Bathycrinus sp. All the hadal crinoids I know of have been placed in the genus Bathycrinus and some believe they are in a Bathycrinus australis species complex.

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