Wọ́n jẹ́ ẹja kékeré, tí wọ́n maa ń dàgbà tó bí   ní gígún, yàtọ̀ sí argentine títóbi, Argentina sílus, t ó maa ń tó bíi .Wọ́n máa ń kó ara wọn jẹ́ lọ́pọ̀ tuutu suf ìsàlẹ̀ òkun, wọ́n maa ń jẹ plankton, krill, amphipods, cephalopods, chaetognaths kékeré, àti ctenophores.Wọ́n máa ń pa wọ́n fún títa tí wọ́n sí maa ń ṣètò wọn fún jípọ̀.Àwọn ìtọ́kasí  ìpojuese, Rainer, and Daniel Pauly, ìrẹsì.. 