Dream Slug Lurker

One of the weirdest things I dreamed of.

It could also be one of the Fungal Guardians, don't you think ?

A peculiar monstrosity which can only be found in a region most infamous, known as the Goreswamps. This dark and damp place takes its name from reddish vegetation that indeed gives an impression of monstrous organs and blood fields stretching for miles in the shadow of Titanic tree roots. There, among strange plants and fungi, the creatures lurk and wait for their prey. Fungal Lurker is an ambush predator, staying submerged for hours with only the stalk-like tentacles above the water level imitating similar looking fungi. Relatively weak jaws are accompanied by a pair of limbs each with four opposable fingers. In more extreme cases the back tentacles can help further restraining the prey, as the creatures apparently only possess internal skeleton in the front portion of the body, allowing its hindquarters to be extremely flexible. Contrary to some beliefs, neither the tentacles nor creature itself produces poison or venom;
The most remarkable feature they possess is a pair of glowy eyes located within its mouth. Some believe these aren't actual eyes but bioluminescent organs that attract unwary prey right into the creatures open jaws, similarly to how some abyssal fish hunt. The majority of researchers, however, believe those aren't bioluminescent organs, not even creature's eye at all. They are eyes indeed, although of a formless shadow entity that needs living vessel to maintain itself in our world. Whether it would be a parasite or a symbiont remains to be seen. True nature and origin of these beasts still eludes scholars.

Fabulous Beasts of Dreamland, M'ajkl the Dream-hunter