It will spray water. Frogs often spray in the water to avoid predators or scare away other creatures. Frog mouth refers to the mouth of a frog. They generally have two mouth shapes: lapel mouth and ground bag mouth. The upper lip of a frog with a lapel mouth covers the lower lip, thus greatly reducing the loss of water; the frog with a ground bag mouth. , forming a small pocket between its upper and lower lips, which helps the frog quickly swallow its prey.