[Coral-List] ID of possible coral parasite?

[Milton McAllister]

Some tiny, sac-like organisms were observed in damaged tissue of a massive 
caribbean coral.  They are approximately 250 microns long and have a 
tube-like opening at one end.  I do not recognize these organisms and would 
appreciate help with identification or suggestions about reference material 
to consult.

Two JPEG photos of the organisms can be observed at the following web 
addresses:
https://netfiles.uiuc.edu/mmmcalli/www/OrganismLoMag.jpg
https://netfiles.uiuc.edu/mmmcalli/www/OrganismHiMag.jpg

Thank you,

****************************************************************
Milton McAllister, Associate Professor, Veterinary Pathologist
University of Illinois
College of Veterinary Medicine
Department of Pathobiology
2001 S. Lincoln Ave.
Urbana, IL  61801
217-333-7005
mmmcalli at uiuc.edu