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Granular Poison Frog
Oophaga granulifera
One of the rarest, smallest, and most difficult Oophaga in the world. Famous for its intensely granular skin (hence the name) and its metallic machine-gun call. Reserved for absolute purists: it demands ultra-specialized aerial terrariums, exclusive oophagous parental care (the mother feeds tadpoles), and unforgiving hygiene parameters.
- Family
- Dendrobatidae
- Origin
- Costa Rica e Panama (Foreste di pianura)
- Origin
- Tropical oceans and reefsCentral America and Caribbean
- Tank use
- Used in 0 tanks
Share
24 °C - 27 °C
n/a
Terrestrial
85 % - 100 %
Low
Description
Geographical Origin and Habitat: Inhabits fragments of pristine rainforest and coastal mangroves of the southern Pacific of Costa Rica and northern Panama. It is an exquisitely arboreal frog that spends its life defying gravity. Never on the muddy ground: it lives, fights, and breeds inside the endless tangle of epiphytes (Guzmania and Vriesea) growing yards high in the suffocating hot, dark canopy.
Taxonomy and Genetics: Belongs to the complex and deadly genus Oophaga. The name 'granulifera' describes the texture of its epidermis, studded with small glands that give it a wrinkled appearance, like a poisonous citrus fruit. Once lumped with pumilio, it stands apart genetically, vocally, and visually. It presents spectacular local morphs (often endangered): from the flaming fire red of the Golfo Dulce, down to olive green and yellow variants.
Behavior and Habits: They are fierce, swaggering lilliputians. Adult males are relentless territorial sentinels that sing incessantly from their perch on a bromeliad. The call is unmistakable: a rapid metallic 'ch-ch-ch-ch' similar to a small ratchet or a distant machine gun. Male-on-male fights break out into literal miniature extreme wrestling matches for the control of the precious axillary water pools of the plants.
Morphology and Sexual Dimorphism: Tiny, fragile, and sharp. Both sexes measure barely between 0.7 and 0.85 inches (18-22 mm), the size of a thumbnail. The body features a bright orange-red back and head (often with a blue or white belly) on cobalt blue or emerald green legs. The rough, granular skin on the back is diagnostic and differentiates it from the smooth skin of O. pumilio. Impossible to sex by sight, except when the male puffs up his explosive dark throat vocal sac while singing.
Care and observations
Terrarium Setup: Extreme aerial jungle microcosm (min. 18x18x24h inches). The floor has almost zero importance except for cultivating springtails. The back wall must be a vertical sponge of tree fern panels (xaxim) or cork, studded with dozens of live Bromeliads rooted up high, tangled vines (Ghostwood), and climbing ferns. Bromeliads are not decoration, they are THEIR HOME: they act as shelter, hunting ground, singing territory, and nursery.
Lighting and Heating: Ultra-precise thermal machines. A heatstroke of 86°F (30°C) kills these jewels in three hours, causing fatal neurological shock. Temperature strictly kept between 75°F and 80°F (24-27°C) maximum during the day, with a life-saving night drop to 72-73°F (22-23°C). Extremely powerful plant-stimulating LED lighting is mandatory to make the live jungle thrive, accompanied by a faint 2% UVB to guarantee vital D3 synthesis.
Humidity and Hydration: Frogs dependent on pure water vapor. They demand 85-100% humidity but with perfect ventilation. Stagnant, stale air and boggy water on the bottom will inexorably kill them with lethal bacterial infections to their paper-thin permeable skin. You need an automatic misting system programmed for light, warm sprays multiple times a day with ONLY RO water. NEVER spray freezing cold water on frogs under penalty of acute fatal heart shock lung failure sad lethargic soft amazing agony.
Feeding and Supplementation: Unstoppable hungry micro-jaws. They can ONLY feed on thousands of springtails and tiny fruit flies (Drosophila melanogaster). They eat every single day. They are frantic insectivores that collapse from bone hypocalcemia (MBD) or paresis from Vitamin A deficiency if you don't dust their insects EVERY DAY with pure extra-fine Calcium powder and a professional pharmacy-grade vitamin complex (like Repashy Calcium Plus). If you skip Calcium, their tiny transparent femurs will snap, sadly shattering in bitter lethargy.
Compatibility and Cohabitation: CHAOTIC MURDER ALERT. Must be kept only in pure pairs (1.1) or carefully balanced, hyper-planted small harems in gigantic glass aviaries. Two males in the same 18-inch tank will fight to exhaustion: the loser will retreat down into the dark mud, stop singing, stop eating, and let himself die of psychogenic starvation, wasted and pale, asphyxiated by pure sadistic stress in a gloomy, lethal, sad corner.
Reproduction: Oophagy (Extraterrestrial Magic). You will NEVER be able to breed them by pulling the eggs. The mother (and only her) has the titanic task of laying on a dry leaf, and when the tadpoles hatch, SHE CARRIES THEM ONE BY ONE ON HER BACK to climb the tree and place them in tiny water pools (one per tadpole) in the Bromeliads. For WEEKS the mother will return to the water cups and lay her own unfertilized egg directly into the tadpole's mouth to feed it. No human can replace this magical, astounding act. A separated tadpole or an underfed mother will condemn the larvae to sadistic cannibalization and fetid lethal starvation in mutually cruel rotting agony.
Amphibian profile
- Diet
- Insettivoro
- Humidity
- 85 % - 100 %
- Day temperature
- 25 °C
- Night temperature
- 23 °C
- UVB
- Low
- Toxicity
- Innocua in cattività (alcaloide assente).
- Life stage
- Estremamente arborea, dipendente dalle bromelie alte.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.

