Dictionary of Ichthyology  

mummy = fish were a staple item in ancient Egyptian diets and were also mummified as representatives of various gods, e.g. Lates niloticus (Latidae) was worshipped as a form of the goddess Neith at Esna, giving rise to the town’s Greek name of Latopolis and Schilbe mystus (Schilbeidae) was the fetish of the delta nome of Mendes, whose local goddess was called Hatmehyt (“foremost of the fishes”) who is usually depicted with a Schilbe on her head. Fish-eating was banned in areas were certain fish species were venerated. 

Falcon-headed, wooden coffin for a fish mummy, Saqqara, Egypt, Roman period, after 30 B.C., British Museum. Photograph by Brian W. Coad.

©Canadian Museum of Nature