Wandering Snail (Radix balthica) Breeding Guide

Radix balthica is a hermaphroditic European pond snail that lays gelatinous egg cords underwater on plants and stones. Offspring hatch as miniature snails with no larval stage.

Overview

Radix balthica, the wandering snail, is a smaller European pond snail of the family Lymnaeidae, also known under the older name Lymnaea peregra. It is found across Eurasia and is a frequent hitchhiker on plants from temperate zones, feeding on detritus and algae.

Sexing

Like all Lymnaeidae the species is hermaphroditic, with separate genital openings, and can perform both self-fertilization and cross-fertilization with a general preference for outcrossing. During mating an individual takes the male role and overlaps onto another, and several snails may overlap so that some act as both male and female at once.

Egg-laying / Reproduction

Eggs are laid in gelatinous cords attached underwater to hard substrates such as rocks, wood and aquatic plants. Because the species is self-compatible, a single individual can reproduce, and populations show wide variation in selfing tendency.

Juvenile Care

The offspring develop within yolk-rich eggs and hatch directly as miniature versions of the parents; there is no free-swimming larval stage. Juveniles graze immediately on detritus and algae, so no special rearing setup is required.