isospondylous

isospondylous

(ˌaɪsəˈspɒndələs)
adj
(Zoology) of, relating to, or belonging to the Isospondyli (or Clupeiformes), an order of soft-finned teleost fishes that includes the herring, salmon, trout, and pike
[C20: from iso- + Greek spondulos vertebra]