Ika niuniu

ʻOku ʻi ai ha ongo haʻa (classis) ʻi he vahe siʻi ʻo e ngaahi monumanu kaungao pe ika kaungao, (gnathostomata):
ika huihui (osteichthyes), ko honau ʻū hui, ko e hui moʻoni; ʻoku vaheʻi ʻi ua:
ika kaponga tala (actinopterygii)
ika kaponga uoua (sarcopterygii) 
ika niuniu (chondrichthyes), ko honau ʻū hui, ʻoku ʻikai faʻu he hui, kā ko e niuniu pe.

Ko e ngaahi ika kau ki ai:
ʻanga
ʻangatea
fakahikuʻulua
ʻangaʻangamofai
matai
lātea
tenifa
ʻaho
ʻalava
kapakauhingano
neiufi
fai
faikili
faimanu
faipala
faitalaʻingatae
faitoho