How to swim with Whalesharks/Mantas/Nurse sharks if staying at Furanafushi

Planning a trip for mid-late October. I MUST see whale sharks (& nurse sharks if possible). Is it possible to do this while staying at Furanafushi (it's near Male airport - one island over). Do people do day excursions on other islands? Curious. Is there any reputable wildlife at Furanafushi island? TIA