Pisces
   Class Actinopterygii Woodward, 1891 - ray-finned fishes
     Order Gasterosteiformes Gill, 1872 - sticklebacks
       1 Family Hypoptychidae - sand-eels
       2 Family Gasterosteidae Günther, 1859 - sticklebacks
       3 Family Aulorhynchidae - tubesnouts
       4 Family Indostomidae
       5 Family Pegasidae - seamoths