root › cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Deuterostomia › Chordata › Craniata › Vertebrata › Gnathostomata › Teleostomi › Euteleostomi › Actinopterygii › Actinopteri › Neopterygii › Teleostei › Osteoglossocephalai › Clupeocephala › Euteleosteomorpha › Neoteleostei › Eurypterygia › Ctenosquamata › Acanthomorphata › Euacanthomorphacea › Percomorphaceae › Eupercaria › Perciformes › Cottioidei › Gasterosteales › Gasterosteidae › Gasterosteus › Gasterosteus aculeatus › Gasterosteus aculeatus aculeatus