Larsson has studied wels catfish populations in their northernmost habitat in Sweden, where these animals have much slower growth rates than in more southern regions due to the colder climate.

The wels catfish itself is full of secrets ... The warmth-loving fish is finding an ideal habitat in the Rhine, where temperatures are steadily rising. "The introduction of power plants on ...

In its native habitat, where the animal is both fished and farmed for food, the wels catfish is not considered a problem species. There, populations appear to have remained relatively stable for ...

which is about four times older than in catfish from the core habitat in central Europe," they wrote. That Wels catfish in Sweden were living so much longer than catfish in mainland Europe a few ...

The wels catfish itself is full of secrets ... The warmth-loving fish is finding an ideal habitat in the Rhine, where temperatures are steadily rising. "The introduction of power plants on ...

Related: Giant Wels Catfish Beach Themselves While Hunting Pigeons The wels also inspires a nearly cultlike following of anglers obsessed with catching and releasing a specimen that’s ...

After 30 minutes, he landed the wels catfish and slipped it into a weighing sling to capture its weight of 133-plus pounds before releasing the fish. “It’s my biggest fish so far that I’ve ...

Alessandro Biancardi with the pending world-record Wels catfish. Although it's hard to say for sure, this is likely the biggest fish ever caught in freshwater. Photo courtesy of MADCAT / Instagram ...

The wels catfish is Europe’s largest freshwater fish with an average size on the Ebro River about 100 pounds. The Wall Street Journal once referred to these behemoths as “a Leviathan worthy of ...