Bladder snails, scientifically known as Physella acuta, are small freshwater snails commonly found in aquariums, ponds, and other freshwater habitats around the world. These snails are easily recognized by their elongated, cone-shaped shells and distinctive breathing siphons, which they use to access oxygen from the water's surface.

Bladder snails are opportunistic feeders, primarily feeding on algae, detritus, and decaying organic matter in the aquarium. As such, they play a valuable role in maintaining water quality by consuming excess nutrients and helping to keep the aquarium clean.

One notable characteristic of bladder snails is their ability to reproduce rapidly under favorable conditions. They are simultaneous hermaphrodites, meaning each snail possesses both male and female reproductive organs and can produce offspring without a mate. This reproductive strategy allows bladder snails to quickly colonize new environments and establish large populations.