Hi again (my last hi tonight),
 
 
I was storing some Thais haemastoma and rustica collected in Natal, NE
coast of Brazil, last May, when I remembered one funny thing that I'd like
to share with you.
 
Both species were collected sharing the same habitat area, feeding on large
Brachidontes (probably B. solisianus) beds, in intertidal area of the reef,
at low tide. Most of them were found in clusters of 5 to 30 specimens. You
could find clusters of T. rustica living 1 feet far from a cluster of T.
haemastoma... but you wouldn't find a cluster with a mix of both species.
After I noticed that, I started to search a mixed cluster and among 20, I
found just one cluster of T. rustica with ONE T. haemastoma. May be it was
there just to visit a friend. ;-)))
 
Question to the experts: is it common? what is the explanation to this
habit?
 
 
Cheers,
 
 
Eduardo Moreira
SQS 104 Bl.D apt.504
70343-040 Brasilia, DF  BRAZIL
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