3 octobre 2010 1 Commentaire

nudibranche abyssal


Marrus orthocanna Kramp, 1942

A large orange deep-water Arctic colonial jellyfish


  • colony length exceeds 1-2 m
  • nectosome (swimming end) upto 10 cm

Color & Characteristics

  • Red/orange with different hues on different parts of the body 
  • Physonect (gas float) yellow-orange
  • Nectophores (swimming units) translucent with bright red canals.


  • Primarily Arctic, with records in the subarctic Atlantic
  • Mostly mesopelagic concentrated between 200 and 800 m
  • Bathypelagic records to ~2000 m


  • Animals swim, then pause and deploy tentacles creating a fishing curtain 30-50 cm from the body stem
  • The diet is unstudied, but likely larger crustaceans such as decapods, krill and mysids, as well as copepods

Life cycle

  • Holoplanktonic,
  • Details, including generation time and life-expectancy unknown

Page Author: Kevin Raskoff & Russ Hopcroft
Created: Aug 20, 2010

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