Karrill na Antarctic

Antarctic krill (Euphausia superba) wani nau'in krill ne da aka samo  ruwan Antarctic na Kudancin Tekun . Yana da karamin, mai yin iyo wanda ke zaune a manyan makarantu, wanda ake kira swarms, wani lokacin yana kaiwa ga yawan dabbobi 10,000-30,000 a kowace cubic mita. Yana ciyarwa kai tsaye a kan minti daya phytoplankton, don haka ta amfani da makamashi na farko wanda phytoplanktan ya samo asali daga rana don ci gaba da sake zagayowar rayuwarsa. Yana girma zuwa tsawon 6 centimeters (2.4 in), yana da nau'o'in har zuwa  , kuma yana iya rayuwa har zuwa shekaru shida. Wani nau'in halittu a cikin yanayin halittu na Antarctic kuma dangane da biomass, E. superba yana daya daga cikin nau'ikan dabbobi masu yawa a duniya, tare da tarin halittu kusan tan miliyan  (; tan miliyan 490). 

 Tsarin rayuwa 
Babban lokacin spawning na Antarctic krill shine daga Janairu zuwa Maris, duka a sama da shelf na nahiyar da kuma a cikin yankin sama na yankunan teku masu zurfi. A cikin al'ada na duk krill, namiji yana ɗaure spermatophore zuwa ga buɗewar jima'i na mace. Don wannan dalili, ana gina pleopods na farko (ƙafafu da aka haɗe da ciki) na namiji a matsayin kayan aikin jima'i. Mata suna sa ƙwai 6,000-10,000 a lokaci guda. Ana shayar da su yayin da suke wucewa daga buɗewar jima'i.

Dangane da ra'ayi na gargajiya na Marriosis De' Abrtona,  wanda aka samo daga sakamakon balaguron sanannen jirgin bincike na Burtaniya RRS Discovery, ci gaban kwai ya ci gaba kamar haka: Gastrulation (ci gaban kwai  tayin) ya saita yayin saukowar   in) kwai a kan shelf a kasa, a cikin yankunan teku a zurfin kusan mita 2,000-3,000 (6,600-9,800 . Kwayar ta fito ne a matsayin larva nauplius; da zarar wannan ya shiga cikin metanauplius, saurayi ya fara ƙaura zuwa farfajiya a cikin ƙaura da aka sani da hawan ci gaba. in depths around t.
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