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fishes..fishies...fisheses.
Note on usage: fish vs. fishesFishes is the English plural form of fish that biologists use when speaking about two or more fish species, as in "There are over 25,000 fishes in the world" (meaning that there are over 25,000 fish species in the world). When speaking of many fish that all are part of the same species, then the word "fish" is used, as in "There are several million fish in the species Gadus morhua."
Prediction:
By the entrails of fishes,
Ichthyomancy;
by sacrificial fire, Pyromancy; by red-hot iron, Sideromancy; by smoke from the altar, Capnomancy; by mice, Myomancy; by birds, Ornithomancy; by a cock picking up grains, Alectryomancy (or Alectromancy); by herbs, Botanomancy; by water, Hydromancy; by fountains, Pegomancy; by a wand, Rhabdomancy; by dough of cakes, Crithomancy; by meal, Aleuromancy, Alphitomancy; by salt, Halomancy; by dice, Cleromancy 
Your post came in in my editing time,Faldage, so doubles.
