Bubble Jellie (5e Creature)
From D&D Wiki
Small beast, unaligned
Tentacles. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 1 bludgeoning damage, and the target must succeed on a DC 11 Constitution saving throw or be poisoned for 1 minute. The poisoned target is paralyzed and it can repeat the saving throw at the end of each of its turns, ending the effect on a success.
A jellyfish modified by magic to drift through the skies instead of the seas. Their name comes from the number of gas-packed bubbles located underneath their gelatinous umbrella that makes them lighter than air. These jellies are frequently seen drifting lazily through the skies, flopping their umbrellas and letting their tentacles wave to snatch up any small creatures unfortunate enough to fly by.