This one was very fun, using a fluffy yellow-orange faux fur to represent the back tendrils, but with the "ears" and tentacles sewn from minky with a plastic spine that lets them pose. A larger spine goes down the whole body, too! Very cool. It's about ten inches long, and the main body is a "marbled" printed minky that I just love.
Although my camera doesn't like the colors here, so they're not quite right. See my previous group photo of invertebrate plushes for the actual colors.