Animalistic Abomination

A sub-type of Eldritch Abomination, the Animalistic Abomination is a monstrosity that resembles one animal, or often multiple, and that resemblance can range from "significant enough to recognize" to "disturbingly accurate", while still remaining definitely "alien" on the Sliding Scale of Anthropomorphism.

This type can be even more nightmarish than your average horror due to the contrast of something so thoroughly and decidedly unnatural appearing in a form "borne" of nature. Somewhat less commonly, Animalistic Abominations may actually be a direct product of their environment, which can sometimes suggest that nature itself is harboring a severe animosity towards locals... assuming you're still currently on Earth, anyway.

If you're not, consider whether or not you're confusing your abomination of choice with a Starfish Alien: Starfish Aliens are most simply adapted to a different environment from humanity and may take on more comprehensible forms for our benefit, whereas Animalistic Abominations (or any kind of Eldritch Abomination) will feel wrong no matter how much they "should" be at home - and their form being familiar to us is anything but a good sign.