The European River Behemoth
Reaching recorded lengths of up to 3 meters (10 feet) and weights topping 150 kilograms (330 pounds), the Wels catfish (Silurus glanis) is the largest native freshwater fish in Europe.
Its smooth, scaleless body is dark greenish-brown with mottled yellow markings, allowing it to rest completely undetected on muddy river bottoms during daylight hours.
The Beaching Pigeon Ambush
In the Tarn River of southwestern France, biologists documented a remarkable evolutionary hunting behavior: catfish deliberately beaching themselves onto dry land to hunt waterfowl and birds.
Positioning itself in shallow gravel shallows, the catfish monitors pigeons drinking along the shoreline. With a violent kick of its powerful tail, the catfish surges halfway out of the water, grabs a pigeon in its mouth, and thrashes backward into deep water to swallow it whole.
Sensory Barbels and Ingestion Power
Equipped with two long, flexible barbels on its upper jaw and four shorter ones beneath its chin, the Wels catfish possesses an acute chemical and electrical detection system.
Its wide, cavernous mouth is packed with hundreds of tiny, backward-curving pad teeth that lock prey in place. Once an animal is clamped, the catfish swallows it whole, expanding its flexible stomach to accommodate large fish, rats, and even small geese.
