It is the beast of the Ebro: a gigantic fish measuring more than 2 meters and weighing 100 kilos that has no scales

In the waters of the Ebro River lurks a creature that could have come straight out of a science fiction movie. It has no scales, can grow to over 2.5 meters long, and can weigh more than 100 kilos. Many fishermen seek it out, but all agree that this river colossus, which thrives especially in areas like Mequinenza, has become one of the 
most striking inhabitants of the Ebro ecosystem.

This is the Ebro catfish, a fish native to Eastern Europe that has colonized Spanish rivers for decades. 
Its excessive growth, resilience, and ability to adapt to different environments have made it an icon of the Ebro catfish, especially in the Mequinenza reservoir, where large catfish that look like real river monsters have been caught.

THE CATFISH, THE FEARSOME GIANT PREDATOR OF THE EBRO RIVER

The catfish is not only impressive for its size, but also for its behavior. It is a voracious predator, capable of feeding on fish, birds, and even small mammals that come too close to the water. Its dark color, elongated body, and enormous mouth give it a disturbing appearance, reinforcing its reputation as the monster of the Ebro. Its presence has altered the natural balance of the river, displacing native species and changing the dynamics of the river ecosystem.

Furthermore, the catfish exhibits territorial and solitary behavior, especially in larger specimens. During the day, it usually remains hidden in areas with aquatic vegetation or submerged structures, such as logs or cavities on the banks, seeking refuge in dark, quiet areas. At nightfall, it becomes active and makes limited but effective movements in search of food, exploring areas near its refuge and following the trail of potential prey.

AN INVASIVE SPECIES THAT IS A BLAZING ATTRACTION FOR SPORT FISHING IN ARAGON

Despite their environmental impact, catfish have become a tourist attraction for sport fishermen from around the world. Every year, fishing visitors come to Aragon hoping to tackle one of these giants. Places like the Mequinenza reservoir have become pilgrimage sites for those seeking the most spectacular large catfish in the country. 

IT IS EDIBLE, BUT BE CAREFUL…

Although its meat is edible, it’s not often seen on restaurant menus. Catfish accumulate contaminants due to their diet and longevity, so their consumption is not without risks. Some fishermen claim that, when properly prepared, they can be tasty, but most prefer to enjoy them as a photographic trophy rather than on a plate. In any case, the catfish continues to fuel legends, fishing records, and a mixture of fascination and suspicion among those who dare to challenge them.