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Pomacea bridgesii, common name 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. These snails were most likely introduced to the United States through the aquarium trade.
The most common apple snail in aquarium shops [citation needed] are Pomacea bridgesii and Pomacea diffusa, (both called mystery snails or spike-topped apple snails, among other things). These species come in different colours from brown to albino or yellow and even blue, purple, pink, and jade, with or without banding.
In the aquarium trade these snails are sometimes called Pomacea or incorrectly Ampullarius, and in English as "[color] mystery snail" or "apple snail". Some species have been introduced outside their native range and are considered invasive because of their voracious appetite for plants.
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Members of the snail family Pulmonata, which includes carboniferous land sails and some freshwater snails of the order Basommatophora, are protandrous hermaphrodites, meaning they are born male and later in life become female. In this family of snails, the male phase ends in December, followed by an egg maturation phase, and ends with ...
Each female bears eggs (up to 30 and at all stages of development) with a size of 3 to 7 mm in diameter and up to the full development of the embryo. At the time of their expulsion, the young are about 7 mm and their shell is already marked with the characteristic stripes of the river snails. After producing all its young, the female dies.
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large aquatic gastropod mollusks, being some of the most widely distributed operculate freshwater snails. This family is classified in the informal group Architaenioglossa according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 .
Marisa cornuarietis, common name the Colombian ramshorn apple snail, is a species of large freshwater snail with an operculum, an aquatic gastropod mollusc in the family Ampullariidae, the apple snail family. These snails are popular in aquariums, and are also used in the wild as a biological control agent.