Cacteye

A cacteye is a cactus-like enemy. The creature will open its eye and release its spikes and starts rolling towards the player. It drops four gold upon defeating but if it is defeated by other means (other creature or falling into hazards) it won't drop gold. They have gold variants that offer eight gold. Green cacteyes are encountered in Scorpion Desert and inside the Sea Dragon.

Trivia
They are known as "eye cactus" in the game files.