Describe the excretory system of the genus Nereis briefly.

简述沙蚕属的排泄系统。

Nereis is a high-protein,low-fat and high-quality Penaeus vannamei feed through nutrition assessment.

通过价,表明沙蚕南美白虾一种高蛋白、低脂肪的优质饲料。

Products: lobworm, blach shell, dried fish etc.

沙蚕、禾贝、鱼干。