> For a few seconds, their eyestalks intertwined, i.e. doubled back nearly 180 degrees around each the other's like intertwined pinkies. They then traveled separately but parallel for a while.

Cute... they're in love!

> Also, is there any simulation of what snails "see",  just as there are simulations of what flies' compound eyes "see"?

The old "mosaic image" idea is long dead. Arthropod compound eyesight
is excellent; each cell in the eye produces an image which overlaps
those of its neighbors, producing a flawless image... almost
wraparound in the case of eg dragonflies.

I'd bet that the majority of snails have pretty good vision. It would
certainly be to their advantage. Their eyes are typically complex, and
even a pinhole camera (and therefore a lensless eye such as that of
nautilus) can give a decent image.

--
Regards
Andrew Grebneff
Dunedin, New Zealand
Fossil preparator
Mollusc, Toyota & VW van fanatic

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