When upstream construction disturbed the ancient spawning grounds, the Tentacle Tyrant was among the first apex creatures to awaken from its centuries-long slumber in the creek's deepest pools. As the fog began manifesting and lesser creatures started emerging, this ancient cephalopod assumed command, using its superior intelligence to coordinate territorial claims. It serves as the primary enforcer of the creatures' expanding dominion over Creekside's water features.

The Tentacle Tyrant possesses eight massive tentacles, each capable of extending thirty feet from its central mass, with bioluminescent suction cups that pulse with an eerie green glow visible through the thickest fog. Its hide bears the scars of countless territorial battles, while rows of smaller feeding tentacles writhe constantly around a beaked mouth lined with razor-sharp teeth. The creature's most unsettling feature is its collection of compound eyes that can track multiple targets simultaneously, allowing it to coordinate attacks while maintaining awareness of the entire battlefield.

The Tentacle Tyrant serves as the middle management of the creature hierarchy, coordinating lesser aquatic horrors while implementing the territorial expansion strategies dictated by deeper, more ancient intelligences. It directly challenges players during the mid-season episodes when creatures begin claiming specific holes and water features as their domain.