See also: Pomacea diffusa, formerly known as Pomacea bridgesii.
Pomacea bridgesii, common names the Spike-topped apple snail or Mystery snail, is a South American species of freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Ampullariidae.
Pomacea bridgesii bridgesii (Reeve, 1856)
Pomacea bridgesii diffusa (Blume, 1957)
Mystery snails possess structurally complex eyes at the tip of a cephalic eyestalk. These snails possess the ability to regenerate the eye completely after amputation through the mid-eyestalk. They are born with both gills and lungs. 
The native distribution of this snail is Bolivia, Brazil, Paraguay and Peru.
It is non-indigenous in Hawaii since 1960 (Pomacea bridgesii diffusa), southeast Asia since 1980s, and Florida since the early 1980s (Pomacea bridgesii diffusa).
Mystery snails lay their eggs above the water line, which take 2 4 weeks to hatch. They can have as many as two-hundred offspring.
It is often kept as an aquarium pet because of its wide range of shell colors, lack of appetite for live plants, and ease of care.
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