I sort of miss the old days when I posted lots of D.V.D. screen captures, often with lengthy Blogspot-flavored captions.
Here's a monster that's been living in my head for thirtysome years. I probably spent more than an hour yesterday trying to find the Captain N episode where it showed up. The answer turned out to be "The Trojan Dragon," which was pretty far down on my list of possibilities. The real image is somewhat disappointing compared to the mental picture, as with most fondly-remembered creatures of my childhood (unless they're from The Dark Crystal).
I've long associated these outré organisms with the viruses from Dr. Mario, but there's no real resemblance. Going from the general vibe, I went looking through Metroid enemy galleries last night. My best guess is that this monster is a loose depiction of geruta (Captain N's adaptations of video games are nothing if not idiosyncratic).