A German fisherman’s catch of the day could at first be mistaken for a giant banana.

Duisburg angler Martin Glatz recently caught a magnificent and very rare “mandarin catfish.” He made the catch while fishing in a lake with his twin brother in the Netherlands.

“At first, I was expecting a big pike,” he said according to Field and Stream. “The fight was comparable to a large 47-inch pike. When I saw what color the fish was, I panicked slightly and yelled at my brother to call for the net.”

Glatz lifted the fish onto the boat, took a few photos, and admired its vibrant yellow colors before releasing it. He hopes the creature will keep growing to be “very big.”

The publication revealed the catch is called a wels catfish (Silurus glanis), a vast species native to European lakes and rivers. The National Oceanic and Atmospheric Administration estimates the species can grow at least 9 feet (2.7 meters) long and weigh up to 300 pounds (130 kilos).

The wels catfish is rarely as bright as the specimen Glatz caught. Most of them have dark greenish-black bodies with a few yellow speckles.

The publication speculated Glatz’s catfish might be suffering from leucism, a rare genetic condition characterized by a loss of pigmentation in the scales. The disease differs from albinism, in the sense it does not affect eye color.

Discoloration causes the fish to become so vivid and dazzling that predators can easily see them. This makes it harder for the prey to hide and survive.

A leucistic yellow catfish was previously discovered in Iowa’s stretch of the Mississippi River during 2017.

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