They don't have a brain or a spinal cord, but a neural net around the bell's inner margin forms a rudimentary nervous system that can sense the ocean's currents and the touch of other animals.

它们没有大脑或脊椎，但体内边缘分布着的神经网组成了最基本的神经系统，能够感知洋流和其他生物的接触。