(c) John Baker - Amphibian and Reptile Conservation (www.arc-trust.org)
Pool Frog (Pelophylax lessonae - formerly Rana lessonae) spawn.
It is noticeable that this spawn clump is considerably smaller than a Common Frog's. However, several such clumps are produced by each female. Less noticeable is that the eggs themselves are smaller than a Common Frog's.