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Subject:	Re: Tridacna questions
From:	bivalve <[log in to unmask]>
Reply To:	Conchologists of America List <[log in to unmask]>
Date:	Fri, 24 May 2002 15:05:08 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (15 lines)

All living tridacnines (Tridacna and Hippopus) have zooxanthellae and also filter feed.  Having two sources of food may contribute to the large size.

Fragines (such as Frgum and Corculum) have zooxanthellae and apparently rely on them exclusively as adults, as they have reduced digestive tracts.

    Dr. David Campbell
    Old Seashells
    University of Alabama
    Biodiversity & Systematics
    Dept. Biological Sciences
    Box 870345
    Tuscaloosa, AL  35487 USA
    [log in to unmask]

That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa

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