Meet Ghost! In one of his pics, it shows a white spot on his belly. Previous owner said it was a scar from an injury from tank decor. Also, a pic shows black underneath its front arms. She said he does this when hes ready to shed. Also, I really don't know if it's the filer, or the frog. But I have noticed a sound like a vibrating object placed on a hard surface. Is this the frog?