RamshornSchnecken

Ramshorn snails, known in German as Ramshorn Schnecken, are freshwater gastropods belonging to the family Planorbidae. They are common in aquariums and occur in ponds, ditches, and slow-moving waters worldwide. They are distinguished by a flattened, disc-shaped shell that is coiled in a single plane; when viewed from above the spiral resembles a ram’s horn, giving the group its common name. Shell color varies by species and morphs, including brown, tan, red, and blue forms in the aquarium trade.

Most ramshorn snails are simultaneous hermaphrodites and mate with another individual. They lay jelly-like egg clusters on plant leaves, decorations, or glass. Eggs typically hatch in a few days to several weeks depending on temperature, producing small snails that grow to mature size within months. Lifespan in captive conditions is commonly one to three years.

Diet and ecology: Ramshorn snails feed on algae, biofilm, decaying plant matter, and uneaten aquarium food. They contribute to tank cleanup but can graze on soft plant leaves, particularly in densely planted or nutrient-rich tanks. They are generally peaceful and slow-moving.

Reproduction and management: In favorable conditions they can reproduce rapidly, leading to population booms. In managed aquaria, removing excess individuals or reducing feeding can help control numbers. They are often considered beneficial or pests depending on the tank balance and plant choice.

Taxonomy and species: The group comprises several species within Planorbidae, including commonly kept types such as Planorbarius corneus and Planorbella spp. They are widespread in freshwater habitats and are not typically endangered.