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A Real American Hero continuity
Marvel Comics continuity
Devil's Due Comics continuity
G.I. Joe vs. Transformers
Action Force (British) Comics continuity
Rumours persisted for some time that Cobra had developed surgically altered Eels to give them insulation, webbed hands & feet and the ability to resist the effects of deep sea diving. The first confirmation came when a W.H.A.L.E. was attacked in the Atlantic Ocean off the coast of north west Africa, with the Eel squad led by a Hydro-Viper. They successfully captured both the Action Force crew and a Tactical Analysis Computer System (T.A.C.S.) containing the key to many Ministry of Defence secrets. However a further crew led a rescue. In the battle the Hydro-Viper's head was crushed by a rock wielded by Lt. Falcon.
Blackthorne Comics continuity
Dreamwave Comics continuity
Hasbro Comics continuity
Animated continuity - Sunbow
- Whilst the Hydro-Viper toy appears to be wearing a full wet-suit, the comic depiction in "War beneath the Waves" implies that it is nearly naked and has surgically altered skin.
- Hydro-Vipers appear as regular enemies on sections 1-1 and 1-2 in the NES Taxan G.I. Joe game (their pet manta rays appear on both sections as well).
- The breed of rays Hydro-Vipers come with are manta rays; not electric rays or stingrays.
- Hydro-Vipers were only animated for commercials.