Sources refer only to 'hammerheads' without consistently resolving species. Retained as a separate genus-level entry rather than assuming every reported animal is S. lewini. Merge these two entries once a source confirms.
seasonalnatural
No formal closure, but two separate limiting periods. Jan-Mar is the hammerhead window and also winter: north-east monsoon wind cancels a high proportion of days, so you can book a week and dive twice. Jul-Sep is typhoon season in the Ryukyus. This is the sharpest example in the dataset of the thing you came for and the conditions that let you see it being in direct opposition. Low operating
Destination detail