While most frogs have teeth of one kind or another, the actual number varies from individual to individual and from species to species, with some frogs displaying only vestigial teeth and others boasting full sets. All frogs have, at the very least, a set of several teeth in their upper jaws which help them to keep prey from escaping their mouths.
Frogs sometimes display sets of fangs which can be used to aid in chewing up prey, something most frogs do not do. Normal frogs swallow their prey whole and use teeth solely for holding prey in place and preventing it from escaping.
Gastrotheca Guentheri is the only frog to boast teeth in both jaws. While no frog poses a threat to humans with its bite, these frogs are prolific predators and feed on many animals ranging from insects to smaller reptiles, amphibians and even small mammals like rodents.
Toads, unlike frogs, do not have any teeth at all. They swallow their prey whole and their jawbones are used as traps, pressing and squeezing prey instead of biting it or sinking teeth in. Frogs' teeth are conical in shape and are sharp enough to pierce the flesh or exoskeletons of prey animals.