The world's largest frog species

Goliath frog, (Conraua goliath), West African frog inhabiting dense lowland rainforests and a few fast-moving rivers and waterfalls in Equatorial Guinea and Cameroon. Classified in the family Conrauidae, it is best known as the world’s largest frog species. Males and females grow as long as 32 cm (12.6 inches), and the largest adults (which are often females) weigh 3 kg (6.6 pounds) or more. The goliath frog is an endangered species whose population has declined because of hunting and capture as well as its specific habitat and food  requirements and narrow tolerance limits, which make it vulnerable to habitat loss and degradation.

The goliath frog’s geographic range  extends from southwestern Cameroon south across the northern half of Río Muni (Continental Equatorial Guinea). It inhabits clear, warm rivers whose temperature hovers near 19.4 °C (67 °F) and nearby riverbanks and humid, undisturbed old-growth or secondary-growth forests (see also secondary succession). The species prefers waters that are highly oxygenated but slightly acidic.