>>13898070>probably because their brain is underdeveloped due to lack of proteinskek
>>13897533Yes, tey do. Most multicellular taxa do. Sponges don't, and in the case of hydra and jellyfish, it is kind of uncertaine. They have nerves, and responses, but noting comparable to a brain, no central nervous system.
But these look like ringworms. Those have a ganglion cerebrale.