Ksarik

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.