Mega frog eggs?

When I caught an impling in my net today, it seems to have just nicked some frog spawn from an unsuspecting gnome. (Why gnomes like to eat that stuff is beyond me...) At first glance its size didn't seem strange to me, but after I dumped it on the ground the frog eggs proved larger than my feet! The frogs that are kept by the gnomes are not much larger, so I wonder what kind of frog this was the spawn of?