An enormous jelly-like being floats peacefully in the warm waters, trailing long seaweed-like tendrils from its central mass.
Monstrous Jellyfish CR 2
A monstrous jellyfish can jet backward once per round as a full-round action at a speed equal to four times its swim speed. It must move in a straight line, but does not provoke attacks of opportunity while jetting.
Monstrous jellyfish can automatically sense the location of anything within 60 feet that is in contact with water.
Environment temperate and warm aquatic
Organization solitary, pack (2-5), cluster (6-11), or swarm (12-23)
The jellyfish’s body is a translucent pink, blue, or purple hollow form resembling an inverted umbrella of sorts. A giant jellyfish’s body averages 8 feet or more in diameter, while its tentacles (trailing beneath it underwater) can reach lengths of around 50 feet or greater. Special muscles on the underside of the jellyfish’s body push water out of it, allowing the creature to swim through propulsion. Jellyfish eat anything that contacts their tentacles – usually crustaceans, fish, algae, and plankton. A monstrous jellyfish spends its time floating in the oceans and seas. When something contacts its tentacles, it quickly rolls its tentacles around the creature or object, attempting to paralyze and devour it.
Monstrous Jellyfish from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene