yeah, april is pushing it. I wouldn't expect to see whalesharks around that time in Sogod. I'm under the impression Nov-Feb was the season there and [-]Feb[/-] November-May in Donsol (where they head to next).
edit: you know, a quick search yields a lot of different info - some claim that the whaleshark season ends there in April, best to ask the resort. The likelihood to see one does decrease around that time.
edit: you know, a quick search yields a lot of different info - some claim that the whaleshark season ends there in April, best to ask the resort. The likelihood to see one does decrease around that time.