Planet:Xenos

Xenos is the third planet of the Telexenos System. It is an Earth-like planet with four contenents.

Prehistory
600 million years ago, the ocean floor was inhabited by walking tentacled creatures who had eyes that only sense light, and had a tentacle with a bulbous tip that is sensitive to touch. It coexisted with a large (6 foot long) lancelet-like animal, who looked pretty much like the animal on Earth, but the differences are that they have better-developed eyes, oral cirrum is inside the mouth, and a larger pharynx. It was the precursor of all vertabrate animals on Xenos, but isn't exactly a vertabrate itself. They were hunted by dart worms, which resemble acorn worms on Earth.