Good shot- I have seen them do that but I'm not sure why. Ok, so I looked it up and there were varying answers but the one that seemed to make the most sense said they could be suffering from a deficiency in magnesium, nitrogen or one other thing I've forgotten now! But you get the picture. The ponds I've seen them do this on are the ones that are virtually covered with them so that makes sense with so many, there'd be a lack of some nutrients. Anyway- the science lesson for the day is over. (o;
@olivetreeann Thanks for the lesson Ann, had I not been so lazy, I should have looked it up. The pond that they are in is partly overcrowded, so your theory makes sense. I thought it was just because they are all so large and cramped ;-)
