FaunaHub

Goliath Frog (Conraua goliath)

AmphibianFrogAfrica

Goliath frog (Conraua goliath), the world's largest frog.

Goliath frog (Conraua goliath).

Image: Ryan van Huyssteen, CC BY-SA 4.0, via Wikimedia Commons.

Overview

The goliath frog (Conraua goliath) is the largest frog in the world — a giant amphibian that can grow to around a foot (30 cm) in body length and weigh as much as a small cat. Found only in a small region of West-Central Africa, it is a powerful, muscular frog of fast-flowing rainforest rivers and waterfalls. For all its size, the adult goliath frog is essentially voiceless, lacking the vocal sac that lets most frogs call.

Despite its bulk, the goliath frog is shy and wary, with excellent eyesight and a remarkable leaping ability — and, as scientists discovered, it even engineers its own breeding pools.

Conservation note: the goliath frog is Endangered, with a small range and declining numbers from habitat loss and hunting. Verify current status at iucnredlist.org.

Habitat & Range

Goliath frogs live only in a narrow band of fast-flowing rivers, streams, and waterfalls within dense rainforest in parts of Cameroon and Equatorial Guinea. They need clean, oxygen-rich, fast water with rocky areas, and their dependence on this very specific habitat makes them especially vulnerable to disturbance.

Diet

Goliath frogs are carnivores that eat insects, crustaceans, worms, fish, smaller amphibians, and other small animals, ambushing prey in and around the water. Their large size lets them tackle relatively big prey, and their powerful legs help them lunge and leap to catch food or escape danger.

Behavior

Goliath frogs are wary and quick to dive into rushing water when alarmed, and they are impressive jumpers, able to leap several times their body length. Remarkably, research has shown that goliath frogs build their own nests: they move heavy rocks to clear and dam small pools at the river's edge, creating sheltered ponds where eggs and tadpoles are protected from the current and predators — a rare case of an amphibian acting as a builder, and possibly a reason these frogs grew so large and strong.

Human Interaction & Conservation

The goliath frog is a famous symbol of African biodiversity but is in serious trouble: it is hunted for food and for the pet and collection trade, and its rainforest-river habitat is being lost to logging, farming, and dam building. Combined with its small range and slow recovery, this has made it Endangered. Protecting its rivers and forests is essential. Consult the IUCN Red List for current status.

More photos of the goliath frog

A goliath frog, showing its enormous size and muscular legs.

Goliath frog (Conraua goliath).

Image: jeanlouisamiet, CC BY 4.0, via Wikimedia Commons.

Frequently Asked Questions — Goliath Frog

How big is the goliath frog?
It is the largest frog in the world, reaching roughly a foot (about 30 cm) in body length and weighing as much as a small cat — far bigger than the frogs most people know. Its enormous size and muscular build make it unmistakable among amphibians.
Does the goliath frog croak?
Not really. Despite its size, the adult goliath frog lacks a vocal sac and is essentially voiceless, so it doesn't produce the loud calls typical of many frogs. It may make occasional faint sounds, but it is famously quiet for such a large amphibian.
Do goliath frogs really build nests?
Yes — and it's remarkable. Scientists found that goliath frogs move heavy rocks to clear and dam small pools at the edges of rivers, creating sheltered nest ponds where their eggs and tadpoles are safe from the strong current and predators. This rock-moving 'nest building' is unusual among amphibians and may help explain their great size and strength.
Why is the goliath frog endangered?
It has a very small range in West-Central Africa and faces heavy hunting (for food and the trade), along with the loss of its specialised fast-river rainforest habitat to logging, farming, and dams. These pressures, plus slow recovery, have made the goliath frog Endangered; current status should be checked against the IUCN Red List.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.