I recently noticed one of my harlequins was a darker colour than usual, also yesterday two of my Cory sterbii seemed to be entwined for some time. This morning I have noticed what I think are several small clumps of eggs on the aquarium glass. Can anyone confirm they are eggs from the photo and is it possible to tell if they are fertilised? From their size I would think it more likely they are Cory rather than harlequins.