The Ramshorn Snail (Anisus vorticulus) is a small snail, with a shell of only 4 to 5 mm in diameter and 0, 5 to 0, 6 mm in height. This snail prefers backwaters and it inhabits areas with floating aquatic vegetation, especially those exposed to sunshine. This species is hermaphrodite... see more - videoguide.ro/en/ramshorn-snail-anisus-vorticulus-delta-dunarii.html