Amphibians
Dwarf Clawed Frog
Hymenochirus · also called African dwarf frog, dwarf underwater frog
A dwarf clawed frog is a frog that never comes ashore. Barely the size of a thumbnail, fully webbed on all four feet, with no tongue and no teeth, it spends its whole life in warm shallow water — hunting worms by smell, humming underwater to attract a mate, and hanging spread-eagled at the surface in a motionless “float” that convinces every new owner it has died.
Overview
Dwarf clawed frogs are the genus Hymenochirus, four tiny (3–4 cm) species from the forest pools and swamps of west and central Africa. They are fully aquatic — permeable skin, reduced lungs, all four feet webbed — and must reach the surface to breathe but cannot survive long out of water. They are carnivores that lunge at small invertebrates and stuff them into the mouth with the front feet, guided mostly by smell.
Underwater life
A breeding male hums underwater with no vocal sac and no air released, and the female answers — rare two-way underwater sound in frogs. The pair spawns at the surface in slow loops, scattering the eggs as dozens of small floating clutches. The famous deadman float — legs straight out, dead still — is just the frog resting near its air supply.
The mix-up
Dwarf clawed frogs are constantly sold as young African clawed frogs (Xenopus), a different genus that grows to 12 cm, has hand-like front feet, eats its tankmates, and is a banned invasive and chytrid carrier in many places. Webbed front feet mean dwarf; hand-like front feet mean the large one.
Status
Least Concern and widespread across the African rainforest belt, though the pet trade takes large numbers from the wild and forest-pool habitat is poorly monitored. With good care they live 5–10 years; captive-bred animals are preferred.
Dwarf Clawed Frog: common questions
What is the difference between a dwarf clawed frog and an African clawed frog?
They look similar as small juveniles but are different animals with very different adult sizes and needs. The dwarf clawed frog, genus Hymenochirus, stays tiny, about 3 to 4 centimetres, has all four feet fully webbed, keeps a slender build, and is a peaceful community aquarium animal. The African clawed frog, genus Xenopus, grows to 12 centimetres or more, has webbed hind feet but unwebbed, hand-like front feet, becomes a heavy-bodied voracious predator that will eat tank mates, and is a notorious invasive species and carrier of the amphibian chytrid fungus, so it is banned or restricted in many countries and US states. A quick check is the front feet. Webbed front feet mean the dwarf; hand-like front feet mean the large African clawed frog.
Can dwarf clawed frogs live with betta fish or in a community tank?
They are often kept with bettas and small peaceful fish, and it can work, but there are real pitfalls. Dwarf clawed frogs are slow, near-sighted feeders that locate food by smell, so in a tank with quick fish they frequently go hungry unless they are target-fed with a pipette or feeding dish. They also need water no deeper than about 30 centimetres so they can surface easily, warm stable temperatures around 24 to 26 degrees Celsius, and gentle filtration. A single betta with a couple of dwarf frogs in a well-planted, properly sized, heated and filtered tank can do well; a dwarf frog in a small unheated bowl with a betta usually does not.
Why does my dwarf clawed frog float motionless with its legs spread out?
This is normal resting behaviour, often called the deadman float or zen floating. A healthy, well-fed dwarf clawed frog will regularly hang at or just below the water surface with all four limbs stretched straight out, completely still, sometimes for ten or fifteen minutes, before suddenly swimming off. It is simply resting while staying near the air it needs to breathe. The signs of an actual problem are different. A frog that is bloated, has cloudy or reddened skin, sits on the bottom refusing food for days, or has fungus-like growths needs attention, but a frog that floats, then swims, then eats normally is fine.
How long do dwarf clawed frogs live, and are they easy to keep?
With good care they commonly live 5 to 10 years and sometimes longer. They are among the more beginner-friendly aquatic animals, being small, hardy, quiet, and undemanding in diet, but they are not maintenance-free. They need a heated, filtered, cycled aquarium of at least around 10 litres per frog, shallow enough to surface easily, with a tight lid because they can climb out and will not survive long on the floor. Their permeable skin makes them sensitive to poor water quality, chlorine, and copper-based medications. Buying captive-bred frogs from a reputable source reduces the chance of getting a stressed, parasitised wild-caught animal or a mislabelled young African clawed frog.