The unhappy snail is one of two Astraea snails. His partner has left an ambling, meandering swath of clean space across the algae-fluffed glass. (I haven't done more than a token cleaning of the glass until I get it cycled and a clean-up crew in here.)
The fascinating one, however, is Nassarius Bob. He's huge (well, the size of my first thumb joint--that doesn't sound huge, but it made quite a perspective shift in a 6-gallon tank, like adding a water buffalo to the back yard. The visual scale suddenly changed.) and digs around in the sandbed looking for carrion and detritus. A small molluskan jackal. He has a beautiful shell, tiny eyestalks, and an immense sensory siphon. He's also FAST for a snail. I mean, he cruises.
Nassarius snails (Bob looks like the one on the top, meaning apparently that he is a Super Tongan Nassarius. )
