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Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung (e.g. Ampullariidae). Most feed on algae, but many are detritivores and some are filter feeders.
Some freshwater pulmonates keep a bubble of air inside the shell, which helps them to float. [1] Many of the very small freshwater limpets which live in cold water have lost the ability to breathe air, and instead flood their mantle cavity with water. [1] Oxygen diffuses from the water to the snail's body directly. [1]
Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example, species in the genus Truncatella) are sometimes considered to be sea snails and sometimes listed as land ...
Lymnaea stagnalis snails can be easily be kept in a freshwater aquarium at room temperature, and fed with various sorts of vegetables, salad, cabbage and dandelion leaves. Fish food will also be eaten, as well as aquarium pests like algae , the Hydra viridissima polyp, and the eggs of other water snails.
This species has been found in waters in eastern North America with pH 6.5–8.4, calcium concentration of 5–97 ppm, magnesium concentration of 13–31 ppm, oxygen concentration of 7–11 ppm, depths of 0.2–7m, conductivity of 63–400 μmhos/cm, and sodium concentration of 2–49 ppm.
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SPOILERS BELOW—do not scroll any further if you don't want the answer revealed. The New York Times Today's Wordle Answer for #1260 on Saturday, November 30, 2024
Limpets are a group of aquatic snails with a conical shell shape (patelliform) and a strong, muscular foot. This general category of conical shell is known as "patelliform" (dish-shaped). [ 1 ] Existing within the class Gastropoda , limpets are a polyphyletic group (its members descending from different immediate ancestors).