A Star Cruster is an enemy that appears in Super Mario RPG: Legend of the Seven Stars. Star Crusters are large, crab-like enemies that can be found in Bowser's Keep. Humorously, even though Star Crusters resemble crabs, they deny being crabs even appear to be offended when people refer to them as such.
In battle, Star Crusters are known for their very high attack and defense. They can attack physically with their claws as their main attack. However, whenever a Star Cruster is attacked directly, they will counterattack with a small ball of energy that can put someone to sleep.