Order Gasterosteiformes (ray-finned fish)
Parent taxon: Percomorpha according to J. A. Long 2011
Sister taxa: Scorpaeniformes, Stephanoberyciformes
Subtaxa: Acanthognathus, Aeoliscoides, Aeoliscus, Aulorhamphus, Aulorhynchus, Aulostomoides, Centriscus, Eoaulostomus, Fistularioides, Gasterorhamphosus, Gasterosteus, Hipposyngnathus, Jungersenichthys, Macroaulostomus, Nerophis, Paraeoliscus, Paramphisile, Parasynarcualis, Prosolenostomus, Protorhamphosus, Pseudosyngnathus, Solenorhynchus, Solenostomus, Synhypuralis, Urosphenopsis
Ecology: nektonic carnivore