Ghidra

Ghidra, also known as Aquaus, Greater Hydra, and Hydra, is a recurring enemy in the series.

Final Fantasy V
Ghidra is an enemy fought at Ronka Ruins alone and at the Interdimensional Rift, and can also be fought in the battle with an Alchymia. It is a dangerous foe as it has Auto-Reflect and battles using Poison Breath and Lightning. It is the earliest that the Blue Magic spell, Level 4 Graviga, can be obtained, and it has the Killer Bow to steal (Ronka Ruins only). If caught by a Beastmaster's Catch ability, it will cast Earth Shaker when released (Earthquake if caught from the Alchymia battle).

Final Fantasy Tactics
Ghidra is a stronger version of the Hydra, having Tri-Attack in addition to the Tri-Flame attack which can hit upwards to three times.