Snake

"Snake" ( Ja) or "Snake monster" (モンスター Ja Monsutā) is a group of Monster Cards originally from the Yu-Gi-Oh! GX manga. They were used by Seika Kohinata and are based on venomous snake or serpent from various mythology.

Just like "Yokai", it is unclear how Snake monsters are identified in the manga. The Japanese text of "Swamp of the Dragon Snake" indicates they are a type of Monster Card like Toon, Tuner etc. The Japanese text of "Viper's Grudge" and "Ananta the Snake Dragon" indicates that they are an archetype like "Archfiend", "Elemental HERO" etc., though no Snake Monsters actually have the specified string 「モンスター」 or 「」in their Japanese names and it is unclear if the two are the same or different from one another. In the International release, the term Snake Monster is removed, instead it is replaced by the term Reptile-Type monster, interestingly in the Japanese text of "Viper's Grudge" is that Reptile can be seen with Type (類族) while Snake wasn't.