The aptly named goliath frog is currently the largest frog in the world. It can grow up to 32 centimetres in length and incredibly, some have been known to weigh up to 3.25 kilogrammes. It is only found within sections of Equatorial Guinea and Cameroon. Due to the destruction of its natural habitats by urban sprawl, this frog may be in danger of becoming extinct in the future. Another interesting feature of this animal is that it can live for up to 15 years in the wild. When raised in captivity and away from predators such as snakes, it can survive for more than 20 years.