This highly dangerous carnivorous lifeform manages to thrive in certain environments in spite of its lack of mobility.
It quietly blends into terrain, camouflaging itself among similar-looking coral or anemone. When prey accidentally stumbles into proximity, the creature quickly lashes out with its strong, adhesive tentacles, and will attempt to pull its target into its thorny, gaping maw.
Assessment: Can be deadly to oblivious explorers. Pay attention to your environment when these creatures are present, watching and listening carefully for signs of imminent attack.