Electric Blue Jack Dempsey CichlidElectric Blue Jack Dempsey Cichlid The Electric Blue Jack Dempsey is a freshwater fish that originates in the murky warm waters of Central America. The Electric Blue Jack Dempsey requires an aquarium of at least 200L, with a fine sand bottom. The plants should be hardy as the Jack Dempsey will burrow around and attack them. They are territorial and will eat smaller fish that they can swallow. Jack Dempsey is carnivorous and will eat most prepared and