Pacman Frog

Overview

The "Pacman" frog is Cranwell's horned frog, named for its huge mouth and appetite ¹². It's a squat, round frog with a broad head and a hornlike ridge over each eye. Colors range from green and yellow to brown, and the hobby also breeds red, orange and albino forms ²³. Males are 3 to 4 inches long and females 4 to 8 inches ³. With good care they live 10 to 15 years ³. Pacmans settle in quickly and don't need much space, which makes them a good beginner amphibian ³.

Natural history

Cranwell's horned frogs live only in the Gran Chaco of Argentina, Paraguay, Bolivia and Brazil ². It's a land of thorn forest, palm savanna and seasonal wetlands. They are nocturnal sit-and-wait predators that stay still for hours, then strike. Hooked teeth and fang-like points on the jaw hold prey, and they'll even eat each other ². In the dry season they bury themselves and estivate for months until the rains return ². Wild frogs often live only 1 to 4 years, but captives can live much longer ².

Enclosure

• Size. A 10-gallon terrarium is the minimum for one frog, and bigger is better for adult females ¹.
• Front-opening tanks make feeding and cleaning easier ¹.
• Hides. Offer one or two, though most pacmans simply bury themselves ¹.
• Water. A shallow dish large enough to soak in, filled with dechlorinated water ¹.
• One per enclosure. They're cannibalistic ².

Temperature & lighting

Use a low-wattage ceramic heat emitter or a heat pad on the side of the tank, not underneath, and check with digital thermometers ¹. UVB isn't strictly required but supports calcium metabolism and overall health. Keep a 12-hour day on a timer ¹.

Humidity

Keep humidity at 60 to 80%, with good ventilation to prevent mold and bacteria ¹. Amphibian skin absorbs water and anything in it. Use water free of chlorine, chloramine, ammonia, nitrite, pesticides and heavy metals. Treat tap water with a dechlorinator, and don't use distilled water ⁴.

Substrate

Provide 3 to 4 inches of moisture-holding substrate such as coconut fiber, cypress mulch or a bioactive soil mix ¹. Keep it damp but not soaking ¹.

Diet & supplementation

• Staples. Appropriately sized insects, no wider than the frog's head ¹.
• Treats. Pinky mice for adults only, and sparingly, since they cause obesity and liver problems ¹.
• Adults. Feed 2 to 3 times a week ¹.
• Calcium. Dust insects with calcium carbonate at every other feeding ¹. Insect-only diets without supplements are a leading cause of metabolic bone disease in amphibians ⁵.
• Avoid substrate in meals. Feed off loose substrate to avoid impaction ¹.

Handling & temperament

Pacmans have sharp teeth and readily bite, so they're best watched rather than handled ³. Human skin oils and bacteria can harm their absorbent skin. If you must handle one, use moistened, powder-free gloves ¹³. Frogs can carry Salmonella, so wash your hands after touching the frog, its water or its enclosure ⁷.

Health

Common issues

• Obesity. Pacmans will overeat if allowed, so watch portions ¹.
• Impaction from swallowed substrate ¹.
• Metabolic bone disease. Soft or deformed jaw, fractures and a curved spine ⁵.
• Retained shed when humidity is too low ¹.
• Infections. Bacterial and fungal infections, including "red leg," usually follow poor water quality, diet, crowding or hygiene ⁶.

When to see a vet

See a vet experienced with amphibians for red or swollen legs or belly, weakness, loss of balance, skin color changes, lumps, a soft jaw or weight loss ⁵⁶.

Breeding overview

In the wild, males call with a horn-like note during the rainy season, November to April, and females lay eggs in temporary pools ². The tadpoles are carnivorous and cannibalistic ².

Legal & ethics

Wild Cranwell's horned frogs face severe habitat loss in the Gran Chaco, and overcollection for the pet trade is a concern. Choose captive-bred frogs and never release one ².

Sources

1. Pacman Frog Care · Tree of Life Exotic Pet Medical Center
2. Cranwell’s horned frog · Smithsonian's National Zoo and Conservation Biology Institute
3. Pacman Frog Care Sheet · PetMD
4. Housing for Amphibians · Merck Veterinary Manual
5. Nutritional Diseases of Amphibians · Merck Veterinary Manual
6. Common Infectious Diseases of Amphibians · Merck Veterinary Manual
7. Salmonella, Feeder Rodents, and Pet Reptiles and Amphibians · U.S. Food and Drug Administration

Last reviewed 2026-10-24 by Novel Fauna. This guide is general husbandry information, not veterinary advice. When an animal is sick, see a veterinarian experienced with exotic animals.

Revision history

1. 2026-10-24 Library: 50 cited care guides, /library/[slug] route, coming-soon cards, SLUGS.txt synced to species.guide_slug 228ce54

Evidence grades: Novel Fauna editorial: source classification, not yet expert-reviewed, 2026-10-25. What the grades mean.

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