Taken a while ago now. I'm trying to encourage them to be aquatic by only providing a small, damp (mossy) land area. 7/9 morphed a while back and were initially 100% terrestrial, but are now ~50% aquatic. The other 2/9 are still aquatic with full gills, and of course ~1cm longer than the others. Now that I'm able to feed mainly in the water and shovel in the earthworms, I expect the size difference to even out again in the next few months.