Cobras are a new enemy in the Spelunky X mod, and are 1 of the 3 poisonous enemies in the game.
The Cobra is an advanced version of the Snake. It is red, poisonous, and if it sees you, it will charge at you. It is modeled by the original snake from all versions of Spelunky.
Cobras will poison you if they touch you, and are the first new enemy in Spelunky X. They are special because not only do they poison you, but they can fall of ledges and charge at you, making them more difficult to kill, and making you be careful the walk under an open platform that has a Cobra on it.
Killing Cobras is just like killing normal snakes. Except, it will poison you if it touches you.