Matamata Turtle
Chelus fimbriata
The living fossil of the Amazon. This bizarre South American turtle looks like a rotting log, with an enormous neck covered in fleshy flaps mimicking algae, and a flattened head shaped like a dead leaf. A strictly carnivorous aquatic animal, it hunts by sucking in water like a vacuum cleaner and requires very large, hot aquariums with strictly acidic water to avoid fungal infections.
Temperatura da água
25 - 29 °C
Valor de pH
5 - 6.5
Ambiente
Água doce / Semiaquático
Umidade
80 - 100 %
Temperatura diurna
27 - 29 °C
Temperatura ambiente
26 °C
Temperatura noturna
18 - 22 °C
Local para se aquecer
30 - 35 °C
Tamanho adulto
45 cm
Gabinete mínimo
>= 600 L
Descrição da espécie
Geographical Origin and Habitat: Undisputed ruler of the river bottoms of the Amazon and Orinoco basins (Brazil, Venezuela, Peru, Colombia). It prefers blackwater, very slow-moving or stagnant waters, heavily enriched with tannins and humic acids released by decomposing forest leaves. They are entirely aquatic animals that despise swimming: they walk on the muddy bottom waiting for prey.
Taxonomy and Genetics: Chelidae family (Side-necked Turtles or 'Pleurodira': they do not retract their neck into the shell by pulling it straight back, but fold it sideways, hiding it under the edge of the carapace). There are two main phenotypic variants: the Amazon variant (with a darker carapace and rectangular scutes) and the Orinoco variant (lighter, orangey with an oval shell).
Behavior and Habits: An extreme ambush predator. Its camouflage ('crypsis') is absolute: motionless on the bottom, it looks like a pile of dead leaves and rocks. When a fish swims in front of its snout, the Matamata instantly opens its huge mouth and expands its throat: this movement creates a pressure vacuum that violently 'sucks' in the entire fish, the water, and everything around it in a millisecond (suction feeding). It then spits out the excess water and swallows the fish whole (its jaws are weak and not made for chewing).
Morphology: They look like prehistoric monsters: a heavily keeled carapace (bumpy and wrinkled, often 18 inches / 45 cm in diameter), a huge, flattened head, and a tubular snout (like a snorkel) that they stretch toward the water's surface to breathe without emerging their body. The neck is covered in fleshy, algae-like fringes, used as sensors to detect the vibrations of passing fish. Adult males have immense, thick tails compared to females, but they are very difficult to sex as juveniles.
Cuidado, criação e companheiros de tanque
Terrarium Setup: As adults they require titanic aquariums (minimum 60x24 inch footprint / 150x60 cm). The water MUST be shallow: they must never have to tread water to breathe, but only stretch their 'snorkel-nose' up while resting on the bottom (water depth max 10-12 inches). No coarse gravel, only very fine sand or bare bottom, heavily decorated with mangrove driftwood. The perfect aesthetic is dark South American blackwater. They NEVER leave the water to bask: it is useless to provide floating docks or dry basking areas.
Lighting and Heating: Hailing from equatorial jungles, they hate the cold. The water must be heated to a constant 80-84°F (27-29°C) using oversized aquarium heaters. Since they do not leave the water, a hot basking spot lamp is useless. They appreciate a low-intensity UVB light (2-5%) positioned very close to the water's surface to absorb radiation while keeping their snout afloat to breathe, but they are extremely sensitive to bright light (photophobic), so the aquarium must be kept in dim conditions.
Humidity and Hydration: There is a life-saving rule for Matamatas in captivity: ACIDIC, AMBER WATER (Blackwater). If kept in normal hard, alkaline European/US tap water, their folded skin and carapace will be devastated by extremely painful and fatal mycosis (fungal infections). It is mandatory to use Indian Almond Leaves (Catappa), Alder cones, or active peat filters to lower the pH to 5.0 - 6.5 and enrich the water with antifungal tannins, turning it a dark tea color. A powerful canister filter is essential, but with a very low return flow rate so as not to create strong currents, which they hate.
Feeding and Supplementation: Fish-eating machines. They will permanently refuse almost any type of commercial pellet, floating insect, or vegetable. They feed exclusively on whole freshwater fish (silversides, home-bred giant guppies, small roach) offered live or thawed, dangling them in front of their mouths with tongs. NEVER feed saltwater fish, Goldfish, or fish containing too much Thiaminase (like minnows), which cause severe Vitamin B deficiency (fatal neurological disorders). Dust thawed fish with calcium and vit. B1 twice a week.
Compatibility: Very peaceful and static with each other. They show no territorial aggression and ignore each other. They can even cohabitate in large groups if space permits. Obviously, any cichlid or small 'tankmate' fish will disappear at the speed of light, being perceived solely as a meal.
Health and Common Diseases: The #1 killer is Cutaneous Fungal Infection (White fuzz). Matamatas kept in crystal clear but hard/alkaline tap water develop layers of deadly mold on their shell, neck, and eyes, leading to fulminant necrosis in a few days. Keep them only in acidic 'tea' (Catappa). Another serious risk is drowning if placed in bare, deep tanks (20+ inches) where they must strenuously swim to the surface for hours just to avoid suffocating.
Origem e distribuição geográfica
Undisputed ruler of the river bottoms of the Amazon and Orinoco basins (Brazil, Venezuela, Peru, Colombia). It prefers blackwater, very slow-moving or stagnant waters, heavily enriched with tannins and humic acids released by decomposing forest leaves. They are entirely aquatic animals that despise swimming: they walk on the muddy bottom waiting for prey.
Origem
Amazônia, Orinoco e GuianasEuropa, Mediterrâneo e Ásia Ocidental
Perfil de réptil
- Dieta
- Carnivore
- The Matamata turtle is a highly specialized carnivorous predator that feeds almost exclusively on live fish. They employ a remarkable ambush strategy, camouflaging themselves against the muddy riverbed while waiting for unsuspecting fish to swim near. When prey is within range, the turtle rapidly opens its massive mouth and expands its throat, creating a powerful vacuum that sucks the fish inside. Because they lack strong beaks for chewing, the prey is swallowed completely whole.
- Tamanho adulto
- 45 cm
- Estilo de vida/Microhabitat
- Aquatic
- They are exclusively aquatic, bottom-dwelling turtles from the Amazon basin that almost never leave the water to bask. They require huge, shallow aquatic setups with acidic, tannin-stained water (blackwater) and a soft sandy bottom, only reaching up with their snorkel-like noses to breathe.
- Ciclo de atividades
- Nocturnal
- Matamata turtles are highly specialized nocturnal ambush predators. They remain completely motionless on the murky river bottom, perfectly camouflaged as a piece of dead wood or leaf litter, waiting for fish to swim by before employing a massive suction-feeding strike.
- Socialidade
- Solitary
- Matamatas are fully aquatic and profoundly inactive, spending most of their time motionless at the bottom of shallow, murky waters. Their distinctively jagged, leaf-like shell and fleshy head flaps provide extraordinary camouflage among aquatic debris. They are incredibly poor swimmers and prefer to slowly walk along the bottom rather than paddle through the water column. They simply stretch their long necks upwards to reach the surface with their snorkel-like snouts to breathe.
- Reprodução
- Oviparous
- Breeding in Matamata turtles typically happens during the dry season of their native South American habitat. Courtship involves the male extending his head toward the female while opening and closing his mouth. The female eventually climbs onto the riverbank to lay a clutch of 12 to 28 roughly spherical eggs in a shallow nest. The incubation period is incredibly prolonged, sometimes lasting up to 200 days before the uniquely shaped hatchlings emerge.
- Tolerância de tratamento
- Display only
- They are strictly a display-only species. While not traditionally aggressive, their long, fleshy necks and delicate sensory flaps are incredibly sensitive to damage. Pulling them out of the water causes immense stress and deprives them of the aquatic support their heavy bodies require.
- Brumação
- Originating from tropical South America, they do NOT undergo brumation. They require consistently warm water temperatures around 26-29°C (79-84°F) throughout the year. Cold water will rapidly suppress their immune system and induce fatal respiratory infections.
- Muda
- Regular
- Shedding happens underwater. Unlike turtles with smooth scutes, their jagged, rough carapace sheds small, flaky pieces, and their skin constantly regenerates. Because they inhabit acidic blackwater, maintaining appropriate water chemistry (pH 5.0-6.0) is crucial to prevent shell rot.
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