In this poper

we consider the model of the oceanic biological system with a general nutrientuptake function and delayed nutrient recycling. The species compete each other for a single essentialnutrient. Under the assumption that input of the nutrient variations is bounded

and there exist the mu-tual interference of each species and the competition of n species. We discuss the boundness of the solu-tion and prove that when the interference constant m<1

the persistence of all species is establishedand doesnot depend on the harvest. When m=1 and the time lag in the recycling term may be neglect-ed

We obtain some sufficient condition for the extinction of the species and necessary condition forthe persistence of the species.