How do Ammocoetes primarily obtain nutrition in their buried larval state?

Answer

Filter feeding using a specialized oral structure extended from the sediment

These larvae are sedentary filter feeders; they extend a funnel-like oral structure out of the silt or sand to draw in water and filter out fine organic matter and detritus.

How do Ammocoetes primarily obtain nutrition in their buried larval state?
animalclassificationlarvalampreyAmmocoetes