Matamata Turtle

Fascinating facts about the Matamata Turtle

• A fully grown mata-mata can stretch a carapace to 45 cm (18 in) and tip the scales at 17.2 kg (38 lb). Its flattened, bark-like shell and leaf-shaped head let it sit motionless in murky water, waiting for prey. When a fish swims close, the turtle snaps its head forward, creating a vacuum that sucks the victim straight into its mouth.
• Scientists have wrestled with the mata-mata's name for centuries, from Testudo terrestris in 1765 to Chelys fimbriata in 1805, and between the mid-1700s and late-1800s a staggering 15 different scientific labels were applied to the same turtle. This taxonomic chaos finally settled when a 2020 genetic study revealed a deep split between Amazon and Orinoco populations, prompting the description of a new species, Chelus orinocensis, and clarifying that the classic "mata-mata" now refers only to the Amazon form.
• A stomach-content check of 20 wild mata-mata turtles found nothing but tiny fish, confirming that despite its fearsome look the species lives almost entirely on small aquatic prey. Night-time hunting in muddy water is aided by exceptionally fine eyesight that reflects light and ultra-sensitive neck flaps that detect the slightest ripple, turning the turtle into a stealthy ambush predator in the Amazon.
• The mata-mata's range stretches across slow-moving streams, stagnant pools, marshes and swamps of the Amazon basin, from northern Bolivia to central Brazil. Its strict aquatic lifestyle means it never leaves the water, preferring shallow spots where its long snout can breach the surface for a breath. This habitat choice, combined with its bark-like shell, lets it blend perfectly into floating debris, evading predators and surprising unsuspecting fish.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Matamata Turtle

The Matamata is one of the most bizarre-looking turtles on Earth. Its flat, jagged head and heavily ridged shell are virtually indistinguishable from dead leaves and bark when motionless on a riverbed. It does not bite or chase prey, it simply opens its enormous mouth and creates a powerful vacuum that sucks fish in whole.

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