Hydra
The Hydra is the first jet fighter to appear in any Grand Theft Auto game, and is based off the McDonnell Douglas (now Boeing)/BAe Harrier II, although the air intake is on the underside of the aircraft and resembles that of a Lockheed F-16. The nose is also somewhat squashed and flatter than the Harrier's nose. The Hydra also includes an auto repair system which can repair the main body of the craft after minor impact. However it can not repair the wings or a head on crash. It is equipped with lock on missiles and flares as countermeasures. It's the fastest aircraft in all of San Andreas and one of the easiest to fly. You can switch between hover and flight mode by pushing the right analog stick forward/back, and on a PC by holding down 8 on the number pad, or Del. The Hydra can be attained by a cheat code or at Easter Basin Naval Station, in a hangar at Verdant Meadows Aircraft Graveyard after the mission Vertical Bird, at Sweet's house after 100% completion and at Area 69 after Black Project.
It is rated by many players as their favourite aircraft, for its speed, agility, and weapons which make it an excellent for any purpose requiring an airplane.
Enemy Hydras will deploy missiles at the aircraft if the player attempts to get in. Two Hydras will go after the player at 4 star Wanted Level or higher and try to take down the player. The enemy Hydras should be no match, as they have a penchant for flying in lazy circles and not deploying flares.
Easter Eggs
Look at the side of the craft, behind the wings. You can see text DMA and something. Rockstar North was formerly known as DMA.