A fish is any gill-bearing aquatic vertebrate (or craniate) animal that lacks limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups. Because the term is defined negatively, and excludes the tetrapods which descend from within the same ancestry, it is paraphyletic. The traditional term pisc is considered a typological, but not a phylogenetic classification.you see the beautiful dolphin fish I hope you’ll like them all beautiful and amazing pictures………