Honebon

Honebōn are skeletal fish enemies that appear in Super Mario Land 2: 6 Golden Coins, specifically in the Macro Zone level Fiery Mario–Special Agent as well as the second and third Turtle Zone levels.

It is said to be the ghost of a Cheep Cheep and, due to its undead nature, it is nearly indestructible. It appears alone and swims around a small territory, moving in a large upside-down V motion. It usually appears in confined spaces, thus making it difficult to avoid. It can only be defeated using a Star or if Mario is able to strike it with a Koopa Troopa shell.