ahh yes thats a possibility. and if you click on the picture it enlarges
I did enlarge it to max size. That clump on the mid-left is a fungal type growth. If you don't like it can scrape off, but that is not going to make it go away. Sometimes those fungi are part of vivarium cycle process and go away by themselves.
Remember to take care of the enclosure and it will take care of your frog !