Kifi halitta ce daga cikin halittun da ake samu a ruwa (aquatic) yana daya daga cikin sanannun halittun ruwa, kifi yana da jinsi iri-iri fiye da nau'uka 71 a duniya, musamman kifayen dake kwance a teku irinsu tekun atlantika da bahar maliya, lallai akwai nau'ukan kifaye wa danda har yanzu dan adam bai gama gano su ba. Akwai; Karfasa Wula Rajiya Tarwada Kurungu Sadin Shawa Shak Mamiyota Ragon rowa ds. Wannan Muƙalar guntuwa ce: tana buƙatar a inganta ta, kuna iya gyara ta.