Now Playing Tracks

Portuguese man-of-war, Physalia physalis
from the Pacific Ocean (Hawaiian Islands)
Photographic portrait by Eric Röttinger
Source: EMBO Winners 2014

The man-of-war is a siphonophore [a class of Cnidarians in the order Hydrozoa where each specimen is actually a colony composed of many individual animals], in this case made up of four types of polyps that form a colony.

  • The pneumatophore is a gas-filled filled polyp that floats on the water surface and allows the colony to sail across the oceans.
  • The polyps that form the long and venomous tentacles (dactylozoids) are responsible for catching the prey,
  • supplying the gastrozoids (polyps in charge of digestion) with food.
  • The fourth type of polyps, the gonozoids, are in charge of sexual reproduction

Eric Röttinger is a developmental biologist and Group-leader at the Institute for Research on Cancer and Aging in Nice (France) and co-founder of the non-profit organization Kahi Kai (‘one ocean’ in native Hawaiian)

92 notes

  1. nowisjustrightnow reblogged this from autotrophe
  2. lilla-sz reblogged this from autotrophe
  3. autotrophe reblogged this from mucholderthen
  4. endesacuerdo reblogged this from mucholderthen
  5. globaleye reblogged this from griseus
  6. gabbythefriendlyghost reblogged this from mucholderthen
  7. apollo-eleven reblogged this from vanesa
  8. rachel-bebe reblogged this from hootowlforlife
  9. thisisntmyrealhair reblogged this from vanesa
  10. swimminginconfusion reblogged this from hootowlforlife
  11. hootowlforlife reblogged this from yazzer-mcfly
  12. yazzer-mcfly reblogged this from stressed-and-well-dressed
  13. stressed-and-well-dressed reblogged this from vanesa
  14. vanesa reblogged this from mucholderthen
  15. dragonheartedpoppy reblogged this from molluscamanifesto
  16. justbeheld reblogged this from mucholderthen
  17. paqomedicine reblogged this from ardyce39
  18. ardyce39 reblogged this from molluscamanifesto
  19. epigenome reblogged this from molluscamanifesto
  20. nomadic-nester reblogged this from molluscamanifesto
  21. molluscamanifesto reblogged this from mucholderthen
  22. bricks-and-wolf-dust reblogged this from mucholderthen
  23. russianlettuce reblogged this from griseus
  24. saldanha77 reblogged this from griseus
  25. polypusapollyon reblogged this from mucholderthen
To Tumblr, Love Pixel Union