Questions › Category: Fisheries Biology › What is fish? 0 Vote Up Vote Down admin asked 11 years ago What is fish? 1 Answers 0 Vote Up Vote Down Anonymous answered 11 years ago Fish is a group of cold-blooded (ectothermic) aquatic vertebrates with gills for aquatic breathing and paired and/or unpaired fins for swimming. Example: Carps, Gars etc. Answer for What is fish?