▁N ass ell arian ▁feed ing ▁is ▁mainly ▁done ▁through ▁extension ▁of ▁pseud op odia ▁out ▁of ▁the ▁bas al ▁opening . ▁The ▁ax ial ▁projection ▁is ▁a ▁very ▁long ▁pseud op od ium ▁that ▁extend ▁out ▁of ▁the ▁bas al ▁a pert ure ▁and ▁is ▁surrounded ▁by ▁shorter ▁terminal ▁pro jections ▁which ▁form ▁a ▁terminal ▁cone ▁around ▁the ▁ax ial ▁projection . ▁The ▁feed ing ▁in ▁segment ed ▁N ass ell ari ans ▁is ▁done ▁in ▁three ▁phases : ▁ 1 ) ▁extension , ▁ 2 ) ▁capture , ▁and ▁ 3 ) ▁retra ction . ▁The ▁geometry ▁of ▁n ass el ari ans ▁is ▁quite ▁benef icial ▁for ▁this ▁feed ing ▁mechanism , ▁as ▁food ▁passes ▁through ▁the ▁bas al ▁a pert ure , ▁which ▁is ▁much ▁larger ▁than ▁the ▁por es ▁in ▁the ▁rest ▁of ▁the ▁ske leton , ▁which ▁is ▁how ▁most ▁sp um ell ari ans ▁must ▁transport ▁food . ▁ ▁A ▁second ▁variety ▁of ▁n ass ell ari ans ▁feed ▁without ▁using ▁an ▁ax ial ▁projection ▁at ▁all . ▁These ▁organ isms ▁instead ▁form ▁a ▁wide ▁terminal ▁cone , ▁which ▁they ▁cast ▁out ▁behind ▁them ▁from ▁the ▁bas al ▁a pert ure ▁like ▁a ▁fish ing ▁net . ▁The ▁three ▁phases ▁of ▁feed ing ▁used ▁by ▁segment ed ▁n ass ell ari ans ▁are ▁also ▁evident ▁in ▁these ▁n ass ell ari ans . ▁These ▁“ f ishing ▁net ” ▁n ass ell ari ans ▁are ▁much ▁easier ▁to ▁see ▁feed ing ▁in ▁the ▁wild ▁and ▁present