Marine corps recruiter said that need 15 credit from college to join marine is right?

No, that's incorrect. While some enlistment options might *allow* you to enlist with college credit, the Marine Corps does *not* require 15 college credits for enlistment. The requirements vary based on the specific enlistment contract and your qualifications. You should check directly with a Marine Corps recruiter for the most up-to-date and accurate information regarding enlistment requirements. That recruiter may have been mistaken or may have been talking about a specific program.