Cobra

(Not to be confused with snakes)

Cobras are enemies that can be found in caverns and deserts. Like snakes, they come in certain colors and inflict varying amounts of damage to the player, but with no status effect. In addition, they all share the same level of sensitivity.

Purple
The normal variety that inhabit Crystal Caverns. Even when approaching them from a few feet away, they will quickly rush over to attack the player, which can make it somewhat difficult to avoid them.

Pink
A lighter-toned cobra with very similar behavior to the purple cobras.

Yellow
This type is native to desert areas, with one in Lonesome Park, and 2 others in Gongoro Peak. One of them can be seen guarding an area where a treasure chest is located.

Red
Only one red cobra can be found in Crystal Caverns, nearby a bridge leading to the Polar Fields. These cobras deal slightly higher damage than the other types: 1 heart and a half.

Black
A black cobra can be seen in Inferno Cave on the left after passing a bat and going up the first bridge of the cave.

Trivia

 * Interestingly, all cobras in the game have a U-shaped mark on the back of their heads.