I saw 2 different whale sark on today. The interaction starts 8:00 am to 11:00 am for 3 hours. They are so friendly to us, because they didn't moving down even people close to him. We swam together with him about 20 minutes. They opened their huge mouths for swallow tiny planktons. It seems to be all the water go through to his mouths. Its so amazing and really beautiful.