DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Pond snail egg mass. Light micrograph showing a number of great pond snail (Lymnaea stagnalis) eggs (yellow blobs), surrounded by a jelly mass (horizontal). Pond snails lay their eggs encased in jelly for protection. Here they are still within their egg cases (clear spheres) but have developed into small snails complete with shells. The snails at this stage move around within the jelly. These were found on the underside of a leaf of the white water lily.
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