Xantravars

Xantravars are bizarre, intelligent hunting creatures, also known as stinging horrors, which inhabit semi-submerged areas like swamps and tidal caverns. The floating monsters appear as two round fleshy bulbs attached together by a strange energy field, with one poisonous stinger for each bulb.

References

• Advanced Dungeons and Dragons, 2nd Edition: Monstrous Compendium Annual, Volume One (1994)