Who konsa kira ha jis ka khon white ha?

Kira (or "worm") jiska khon white hota hai, usay "icefish" kehte hain. Icefish ki khasiyat yeh hai ke inka khon hemoglobin nahi hota, isliye inka khon safed nazar aata hai. Yeh machhliyan Antarctica ke thande paniyon mein payi jati hain aur inka khon oxygen ko paani ke zariye absorb karne ki salahiyat rakhta hai.