Anacondaur is a fiend in Final Fantasy X encountered in the Calm Lands. It is one of the few opponents from which Kimahri can learn the Ronso Rage Overdrive, Stone Breath. In battle, Anacondaurs will use said attack to attempt to Petrify one character. They also use an attack called Sonic Tail that strikes all party members.
It also absorbs any Lightning-elemental damage, converting the damage to HP which ultimately heals it.