鰭条 is read as きじょう (kijou) and means fin ray.
きじょう
kijou
じょうきこう
Actinopterygii (class of the ray-finned fishes)
すじ
(Edo period) counter for hundreds of mon (obsolete unit of currency)
ばね
spring
しんじょう
creed
いちじょう
one matter (affair, event, case, incident)
べつじょう
something unusual
きんかぎょくじょう
golden rule (basic principle ensuring success in some activity)
だいいちじょう
first article
ぜんじょう
preceding article
せいかつしんじょう
one's philosophy of life
いいじょう
although
けんぽうじゅうしちじょう
Seventeen-Article Constitution (of Asuka-period Japan)