- any of the numerous fishes of the order or suborder Nematognathi (or Siluroidei), characterized by barbels around the mouth and the absence of scales.
- a wolffish of the genus Anarhichas.
- any of various other fishes having a fancied resemblance to a cat.
- a person who assumes a false identity or personality on the internet, especially on social media websites, as to deceive, manipulate, or swindle.
- to deceive, swindle, etc., by assuming a false identity or personality online: He fell in love with her online before he realized he'd been catfished.
- any of numerous mainly freshwater teleost fishes having whisker-like barbels around the mouth, esp the silurids of Europe and Asia and the horned pouts of North America
- another name for wolffish