A waje, kifin batsa suna da kama da sitaci iri iri. Hakanan ana san su da babban zagaye (ko triangular) kai da ƙaramin wutsiya, tare da kusan kusan kasancewa babu jikin. Manyan wakilai na jemagu suna da tsawon rabin mita, amma galibi suna kanana kadan. Yayin juyin halitta, ƙusoshin gaba ɗaya sun rasa ikon kiyaye kifayen, don haka dole ne suyi iyo tare tekun. Kodayake sun yi rarrafe tare da babban koma baya, a matsayin mai mulki suna ciyar da lokacin hutu su kawai kwance a ƙasa, suna jiran abin da za su same su ko su sa shi ta musamman kwan fitila kai tsaye daga kai. Masana kimiyya sun tabbatar da cewa wannan kwan fitila ba ta daukar hoto ba ce kuma ba ta jawo ganima da hasken ta. Akasin haka, wannan tsari yana da aiki na daban - yana shimfida wani ƙanshin wari a kusa da mai masaukin sa, wanda ke jan hankalin ƙananan kifaye, crustaceans da tsutsotsi.
Ana samun jemaguran teku a ko ina cikin ruwan dumi na teku, baya yin iyo a cikin ruwan sanyi na Arctic. A matsayinka na mai mulkin, dukkan su suna da zurfin zurfin mita 200-1000, amma akwai nau'ikan nau'ikan gwaje-gwaje waɗanda suka fi son zama kusa da shimfiɗa, nesa ba kusa da tekun ba. Mutum ya saba da jemage, wanda ya fi son ruwan sama. Kifin ba shi da sha'awar ciki, amma harsashi ya zama mai ban sha'awa ga mutane, musamman ga yara. Kifi-busassun kifi sun bar baya da ƙarfi carapace mai kama da kunkuru. Idan ka ƙara banyun duwatsu a ciki, zaka sami ƙara mai ƙarfi, wanda tun zamanin da aka san mazaunan gabashin hemisphere, suna rayuwa a tekun.
Kamar yadda mutum zai zata, safarar jirgin kamar wata jaka ce ta kariya daga manyan mazaunan teku. Thearfin hakoran mai ƙarfi ne kawai zai iya fashe ƙirar don isa ga naman kifin. Haka kuma, samo wata bat a cikin duhu ba mai sauki bane. Baya ga gaskiyar cewa kifin yana da lebur, kuma yana haɗuwa tare da shimfidar wuri mai kewaye, haka ma launi daga harsashi yana maimaita launi na bakin tekun.
