I appear to now have loads, Are they doing any harm? they seem to have a very round shell, with whiteish spots on. One of them looks like it has an extra little bit poking outof the side of its shell, any idea?
I had a bbq on sunday and didnt do my usual check of my tank and unforunatly when I checked it monday a glass fish had died, so I think they had a good feast on my poor fishy