internal cephalization

What Animals Have No Cephalization? Examples include echinoderms (starfish, sea urchins, sea cucumbers) and cnidarians (corals, anemones, jellyfish). Animals that can’t move or are subject to currents must be able to find food and defend against threats from any direction. Does cephalization exist in Aschelminthes? Externally, there is little differentiation between the anterior and posterior