The terrible Ksarik from the Alien Archive.

Here a citation from the book :

Ksariks’ ancestors lived on Castrovel as mindless, animate plants that scavenged for food and sprouted their seedlings within corpses, rarely posing more than an incidental threat to other species. Millennia of ongoing strife between the planet’s formians and lashuntas bombarded these primeval ksariks with psychic energy, and only decades before the two factions’ recent peace deal, the plants began exhibiting rudimentary intelligence and a predatory drive. In an unsettlingly small number of generations, ksariks have developed a pack mentality, low cunning, and the preternatural ability to adopt competitors’ strengths.

Printing on smaller scales may be tricky with the tentacles and all but it's possible, just be careful when removing support.

Modeled with Blender.