| They are, in fact, sensory tentacles. They are prominent in lower level mollusks. There's some good stuff about snails in one of the reefkeeping mags. Lemme dig it out.
Dave
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"Fins to the left...Fins to the Right, I'm going home to play with my reef tonight..."
If you're looking for me, and I'm MIA from the board, email me at JustDavidP (at) gmail (dot) com.
Experience in aquaria, 35 years. Experience in marine, 20+ years. Experience in Reef Keeping, 6 years. Always a newbie! | 
