Green Horned Frog (Ceratophrys cranwelli) Care Guide

Overview

The Green Horned Frog, also known as the Green Pacman Frog, is a colorful, hardy amphibian prized for its bright green patterning, large mouth, and round body. Native to South America, these frogs are ambush predators that spend most of their lives burrowed, waiting to snap up prey. Their vibrant color and simple care needs make them a favorite among frog keepers.

• Scientific Name: Ceratophrys cranwelli

• Common Names: Green Horned Frog, Green Pacman Frog

• Origin: Argentina, Paraguay, Bolivia

• Adult Size: 4–7 inches (10–18 cm)

• Lifespan: 8–10 years in captivity with proper care

• Temperament: Solitary, aggressive feeder

Enclosure Requirements

• Tank Size: 10–20 gallon terrarium for one adult. These frogs are not active, so floor space is more important than height.

• Substrate: Moist coconut fiber, sphagnum moss, or a bioactive soil mix, at least 3–4 inches deep for burrowing.

• Temperature:

  • Day: 75–82°F (24–28°C)

  • Night: 70–75°F (21–24°C)

  • Use an under-tank heater (placed on the side of the tank) or a low-wattage heat bulb if needed.

• Humidity: 60–80%. Mist daily, ensuring the substrate stays damp but not soggy.

• Lighting: A standard day/night cycle is enough. Low UVB (2.0–5.0) can be beneficial but is not required.

• Water: Provide a shallow dish of dechlorinated water large enough for soaking. Change water daily to prevent bacteria buildup.

Diet

Green Horned Frogs are opportunistic carnivores with big appetites.

• Juveniles: Feed daily.

• Adults: Feed every 2–3 days.

• Foods:

  • Crickets, dubia roaches, nightcrawlers, silkworms

  • Occasional treats: small feeder fish, pinky mice (in moderation only)

• Supplements: Dust feeder insects with calcium powder 2–3 times weekly and add a multivitamin once a week.

⚠️ Avoid feeding a rodent-only diet, as it can cause obesity and liver issues.

Behavior & Temperament

• Ambush predator – they spend most of their time buried with only their eyes showing.

• Strong feeding response – use feeding tongs to prevent accidental bites.

• Solitary – do not house with other frogs, as cannibalism is likely.

Handling

• Handling should be avoided. Their skin absorbs oils and chemicals from human hands.

• If handling is necessary (such as moving the frog), use damp, clean gloves and keep contact minimal.

Special Notes

• Known for their “Pacman-like” mouth and bold coloration.

• A healthy Green Horned Frog will appear round, eat eagerly, and burrow regularly.

• With proper care, they thrive for nearly a decade in captivity.

✅ Summary:
The Green Horned Frog (Ceratophrys cranwelli) is a hardy, low-maintenance amphibian with vibrant coloration and a bold personality. Perfect for keepers who want a striking display animal, these frogs thrive with proper humidity, warmth, and a varied carnivorous diet.