Aquaman was riding his motorcycle along the Malibu coast Thursday and Mr. Adonis actually outdid himself without having to flash his washboard abs or heart-melting smile. Jason's a motorcycle enthusiast, so it's no wonder he's got the bike gear down to a T.

Jason later pulled into a gas station and pumped some gas ... proving Jason can make even the most menial task look like art. And thank the mighty stars he pulled into the station ... cause he took off his helmet and flashed his mane and that smile.

BTW ... Jasons' gotta be the guy George Thorogood was singing about in "Bad to the Bone," right? One look at Jason riding his bike and no doubt dude's broken at least 1,000 hearts.

No word if nurses gathered around the day he was born.