ystem s . ▁It ▁pre ys ▁upon ▁Lim ac ina ▁ant arct ica ▁It ▁is ▁itself ▁e aten ▁by ▁the ▁med usa ▁Di pl ul mar is ▁ant arct ica . ▁C . ▁ant arct ica ▁has ▁a ▁large ▁li pid ▁storage ▁capacity : ▁up ▁to ▁ 5 % ▁of ▁its ▁wet ▁mass . ▁It ▁is ▁able ▁to ▁surv ive ▁without ▁food ▁for ▁about ▁six ▁months ▁by ▁util izing ▁these ▁li pid ▁storage ▁res erves . ▁Cl ione ▁ant arct ica ▁l ays ▁eggs ▁in ▁the ▁spring . ▁ ▁This ▁species ▁def ends ▁itself ▁from ▁pred ators ▁by ▁synth es izing ▁an ▁ich thy od eter rent ▁( a ▁chemical ▁that ▁det ers ▁fish es ); ▁this ▁is ▁a ▁previously ▁unknown ▁mole c ule ▁called ▁p tero en one . ▁The ▁sea ▁ang el ▁acts ▁as ▁a ▁" gu est " ▁for ▁the ▁hyper i id ▁am ph ip od ▁Hyper iella ▁dil at ata , ▁which ▁takes ▁advantage ▁of ▁the ▁protection ▁provided ▁by ▁the ▁g ast rop od ' s ▁ic thy od eter rent . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Bry an ▁P . ▁J ., ▁Y osh ida ▁W . ▁Y ., ▁McC lin to ck ▁J . ▁B . ▁& ▁Baker ▁B . ▁J . ▁( 1 9 9 5 ). ▁" E colog ical ▁role ▁for ▁p tero en one , ▁a ▁novel ▁ant ife ed ant ▁from ▁the ▁consp ic uous ▁ant ar ctic ▁p ter op od ▁Cl ione ▁ant arct ica ▁( G ymn