Remi Masson / Group of Black bullhead (Ameiurus melas) shoaling to protect themselves against predators, River Rhone, Rhone-Alpes, France, July.
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Remi Masson / Group of Wels catfish (Silurus glanis) gathered in the River Rhone, France, August.
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Wild Wonders of Europe / Roggo / Diver near a very large Wels (Silurus glanis) Rio Ebro, Spain, May 2007
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Georgette Douwma / Kaleidoscopic image of Striped catfish (Plotosus lineatus) school feeding on sea bed. West Papua, Indonesia.
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David Hall / Striped eel catfish (Plotosus lineatus), shoal of juveniles. Komodo, Indonesia.
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Shane Gross / School of Striped eel catfish (Plotosus lineatus) move through seagrass, eating the algae growning on the seagrass blades. Manado, Indonesia.
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Pascal Kobeh / Wels catfish (Silurus glanis) on the bottom of the river. Its face has a scar probably caused by a fishing hook. Cher River, Loir-et-Cher Department, France
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Pascal Kobeh / Two Wels catfish (Silurus glanis) on the bottom of a river. The one on the foreground has a scar on its face probably caused by a fishing hook, Cher River, Loir-et-Cher Department, France
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Cyril Ruoso / Wels catfish (Silurus glanis) group gathered in river bed. Loire river, France. November.
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Cyril Ruoso / Wels catfish (Silurus glanis) Loire river, France. November.
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Cyril Ruoso / Wels catfish (Silurus glanis) Loire river, France. November.
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Cyril Ruoso / Wels catfish (Silurus glanis) Loire river, France. November.
