Mata Mata Turtle Care Guide (Chelus fimbriata)
The bizarre mata mata is a blackwater ambush piscivore that suction-feeds on live fish, barely basks and needs warm, soft, acidic water — a true specialist.
Overview
The mata mata (Chelus fimbriata) is a side-necked turtle of the family Chelidae with one of the strangest profiles of any reptile: a large, triangular, flattened head covered in tubercles and skin flaps, a long tubular snorkel-like snout, and a neck longer than the vertebrae beneath its carapace, fringed with small skin flaps. The reduced plastron is deeply notched at the rear.
Natural Range & Size
It lives in the Amazon basin and the rivers of the eastern Guianas, across Bolivia, Peru, Ecuador, Colombia and Brazil, in slow-moving streams, stagnant pools, marshes and swamps. The carapace reaches up to 45 cm (18 in) and weight up to 17.2 kg (38 lb); care references describe full-grown adults at roughly 16 to 20 inches.
Aquatic Setup & Filtration
Keep the water shallow enough that the snout can reach the surface to breathe — about 8 to 10 inches deep for an adult and 3 to 4 inches for a hatchling — in a large enclosure (a minimum of about 4×4 feet for 16-inch-plus animals). Aim for slightly acidic water near pH 5 to 6, using sphagnum moss to raise acidity, with good filtration; oxygen flow helps suppress unwanted bacteria.
Basking & UVB / Temperature
Keep water temperatures around 80 to 90 °F. The mata mata is not a strong basker, but care references still suggest offering a basking spot with a 75- to 150-watt heat bulb about one foot above it (basking area mid- to upper 90s) plus a UVB-emitting bulb.
Diet
It is an ambush carnivore that stays motionless and hunts mostly at night in murky water, then suction-feeds: it opens its huge mouth to create a vacuum that pulls prey in whole. Feed live fish such as minnows, platies, mollies, guppies, goldfish and sunfish, keeping the enclosure stocked with 30 to 40 fish at a time.
Health & Longevity
Mata matas are long-lived, averaging about 40 to 75 years, with some exceeding 100 years under proper care. Most health problems trace back to wrong water chemistry, inadequate temperature or an unsuitable diet, so stability across all three is essential.
Common Mistakes
- Water too deep, leaving the snorkel snout unable to reach the surface comfortably.
- Keeping it in hard, alkaline water instead of soft, acidic blackwater near pH 5-6.
- Expecting it to bask and forage like a typical slider rather than ambush at night.
- Failing to maintain a constant supply of appropriately sized live fish.