Puddingfish

The puddingfish looks like an ordinary jellyfish grown enormous and a little more solid. Its dome spans close to eight feet, and its tendrils trail more than 20 feet beneath. The whole body is a blue-green jelly much like that of a gelatinous cube, and that color hides it so well in the water that fishing boats sometimes ride right up onto its back. Since the creature cannot raise its tendrils at all, such a collision is usually just a nuisance for anyone who stays aboard.

When a raft or small boat strikes one, every passenger near the edge rolls against Dexterity or tumbles overboard. Anyone in the water beside it should swim for their life. The puddingfish is sluggish, and a strong swimmer can outpace it, though few on the desert world ever learn to swim well outside the valley around this sea.

A tendril strike forces a save vs. paralyzation; failure leaves the victim numbed and helpless for 4d4 rounds. In the water that is often a death sentence unless a brave companion drags the body to safety. When the victim dies, the snakelike tendrils lift the corpse into the dome, where digestion takes 1d4+2 days.

Puddingfish drift alone. They have no sexes and reproduce by splitting once they grow past a certain size. Lizard men hunt them for their hides, which carry no poison, and turn them into clothing, sails and other useful goods.

The dome is really a stomach full of fiercely corrosive acid. Reckless adventurers sometimes risk their lives harvesting this acid, which has many potential uses.