>>27708750A wiwaxia is a prehistoric organism found in the Cambrian explosion(as in a lot of new animals just appeared in the ocean out of thin air). I don't remember whether or not wiwaxia is considered a mollusk or an echinoderm as of today's studies.
>>27709613That's true, but mostly a gooey, toxin to repel predators. Guts are just a byproduct of the expulsion. But it comes out the front, not the sides.
>>27711115They don't really eject their stomachs, it's more of an ooze.
