Electric Eel Communal Hunting — Amazon Brazil
The electric eel's communal hunting behaviour — documented in a 2021 Nature paper — was found in the Iriri River of Pará state, where groups of up to 100 electric eels coordinate to herd schooling fish into tight balls at the water surface, then discharge simultaneously in coordinated pulses to stun the prey. Individual electric eels produce up to 860 volts; a simultaneous discharge from 100 eels creates an electrical event sufficient to stun fish at the surface and render them temporarily paralysed. The behaviour — the first documented coordinated social hunting in electric fish — is visible from canoe when eels are active at dawn in river margins, and the sight of multiple large eels simultaneously breaching the surface while fish jump clear of the discharge creates one of the Amazon's most dramatically unexpected wildlife encounters.
About this spectacle
At dawn on the margins of the Iriri River in Pará state, Brazil, one of the Amazon's most improbable wildlife spectacles unfolds. Groups of up to 100 electric eels converge to herd schooling fish into tight, panicked balls at the water surface. Then, in coordinated pulses, the eels discharge simultaneously — each capable of producing up to 860 volts — creating a collective electrical event powerful enough to stun and paralyse fish across the surface. The stunned prey float momentarily, easily collected. What visitors witness from a canoe is extraordinary: large, muscular eels breaching the surface in near-unison, small fish launching themselves clear of the water in desperate escape, and the eerie sense of invisible force rippling through the shallows. The air carries the smell of river mud and jungle; the sound is of splashing fish and the distant canopy. Documented in a 2021 Nature paper as the first known cooperative social hunting in any electric fish species, this is a glimpse into behaviour science had not imagined existed.
When to go
Jan — Dec
Getting there
Nearest airport: BEL. Nearest city: Altamira.
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