'egg in pond'

'egg in pond'

Observation - 'egg in pond' - UK and Ireland. Description: we created a pond in 2010 and saw an egg shaped mass at the bottom in August 2010. This year there are several of these, though they do not aggregate together. they are the size of a hen's egg, and can be seen from the egde of the pond in about 2 feet o

we created a pond in 2010 and saw an egg shaped mass at the bottom in August 2010. This year there are several of these, though they do not aggregate together. they are the size of a hen's egg, and can be seen from the egde of the pond in about 2 feet of water. Although they look like an egg, they do not have a hard shell but have a soft membrane which indents sometimes. i have no idea what this is, please help