I think we need to differentiate between a herd - say of Strombus
thersites, known to move and feed in a fast moving colony as opposed to
a group -- a whole lot of Nassarius feeding on a dead crab.  Something
dead which attracts a host of feeders like vultures to a dead cow is
something we can all easily accept in the mollusk world.  I would call
Fred's Cypraea the later case - a group.  In this case also attracted by
good feeding.  Now if they grazed the algae clean and then left in mass
for other feeding areas...  And I think the pack of murex all feeding
also fit this category.  So Fred, or Patti, anyone else, any other cases
of "herd" like behavior similar to the S. thersites?  And please warn me
before I get accused of beating a deceased equine.  I have been waiting
around the house all day for my new computer to arrive -- which it never
did.  So instead of doing anything constructive on this machine I was
stuck asking questions of those who have been there.
 
Tom Eichhorst in New Mexico, USA
 
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