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Flathead catfish ( Pylodictis olivaris ) may look like they are perpetually smiling, but these five foot-long fish are no laughing matter in regions where they do not belong . - Popular Science from NFB-NEWSLINE.

Flathead catfish ( Pylodictis olivaris ) may look like they are perpetually smiling, but these five foot-long fish are no laughing matter in regions where they do not belong . - Popular Science from NFB-NEWSLINE.
Update: 2025-09-08
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Flathead catfish ( Pylodictis olivaris ) may look like they are perpetually smiling, but these five foot-long fish are no laughing matter in regions where they do not belong .
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