Very little is known about the specific biology of Bithynia zeta, but it is assumed to be similar to other species within the Bithyniidae family.
Most species within the Bithynia genus are primarily thought to be filter feeders, but are known to switch to grazing when blooms of algae occur in the spring, or if the concentration of food particles suspended in the water decreases (6).
In some species of Bithyniidae, food particles are filtered through a net of mucus and become trapped before being ingested (3) (5).
Most Bithyniidae species have an annual life cycle, and can live for approximately three years (3). The female is oviparous (4), and the eggs are laid in small clusters (5). The eggs have exit holes which are used when the juveniles hatch (4), but these are closed off during development with a capsule or plug (4) (5).