The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesn't need its brain anymore so it eats it!
Basically I was a rebel growing up. I got kicked out of six schools. But I don't think that it makes you less of an intellect. You know, if you ever crave knowledge, there's always a library.