DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Pond snail egg masses. Light micrograph of the underside of a white water lily (Nymphaea alba) leaf (green), showing a number of great pond snail (Lymnaea stagnalis) egg cases (sausage-shaped). Pond snails lay their eggs encased in jelly for protection. Most of the eggs have already developed into miniature snails complete with shells.
Model release not required. Property release not required.