DNA, Helminth - genetics, Ascaridida Infections - veterinary, Ascaridida Infections - transmission, Helminth Proteins - chemistry, Molecular Sequence Data, Phylogeny, Bird Diseases - parasitology, Electron Transport Complex IV - chemistry, Fish Diseases - parasitology, Ascaridoidea - anatomy & histology, DNA, Ribosomal Spacer - genetics, Base Sequence, Fishe...