A maroon Xestosponge, Sea Frost, delicate Black Coral, and a very unusual Monaxial Sponge.
 Jackson Bay, Little Cayman Island
- Depth 110 feet or 34 meters
 

Marine Invertebrates from Caves and Walls - Caribbean Underwater Photography Gallery V

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Marine Invertebrates of Reefs, Walls, and Caves

Caribbean Underwater Photography Gallery V
 

  * The maroon sponge in the above image is a large example of Xestosponge.  It contains in its folds lacy filaments of Black Coral (Antipathes sp.), and supported by some of these filaments is a very unusual Monaxial Sponge (Monaxonida sp.).  This sponge is typically white, almost globular, and sports a large number of thin  glassy filaments.  We seldom encounter Monaxial Sponges when diving, and only rarely are we able to find an environment enabling us to isolate one.  The large white mass is a colony of Sea Frost, that is; of the the Colonial Serpulid Worm (Filograna implexa).

Jackson Bay, Little Cayman Island - Depth 110 feet or 34 meters

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