The 27 Best Deep-Sea Species: #8 Red Lure Jellyfish

S_erenna_whole_2#8: Erenna sp. (Phylum: Cnidaria, Class: Hydrozoa, Order: Siphonophorae, Family:Agalmatidae )

Roxanne..You don’t have to put on the red light..Those days are over…You don’t have to eat something else’s body in the night. 

Perhaps one of the coolest uses of biolumenscence occurs in the genus Erenna.  As Steve Haddock, fellow MBARIan and expert on all luminescent, notes "Of all the luminous organisms in the sea, only a few are thought to use light to lure prey, and fewer still have been known to make red light."  The red light occurs at the end of modified tentacle tips that when flicked closely resemble copepods.  Don’t swim toward the light little fishy!  You can proceed to Steve’s page, where I gratuitously stole the pictures here from, and get more information, scientific papers, and see VIDEO!

Erenna_schematic_2

Dr. M (1801 Posts)

Craig McClain is the Executive Director of the Lousiana University Marine Consortium. He has conducted deep-sea research for 20 years and published over 50 papers in the area. He has participated in and led dozens of oceanographic expeditions taken him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses on how energy drives the biology of marine invertebrates from individuals to ecosystems, specifically, seeking to uncover how organisms are adapted to different levels of carbon availability, i.e. food, and how this determines the kinds and number of species in different parts of the oceans. Additionally, Craig is obsessed with the size of things. Sometimes this translated into actually scientific research. Craig’s research has been featured on National Public Radio, Discovery Channel, Fox News, National Geographic and ABC News. In addition to his scientific research, Craig also advocates the need for scientists to connect with the public and is the founder and chief editor of the acclaimed Deep-Sea News (http://deepseanews.com/), a popular ocean-themed blog that has won numerous awards. His writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.