Dude, your information is really just a mess. Let's start here: There are several Bangka islands in Indonesia. The one everyone goes to dive is north of Manado. I circled the area in blue. The Bangka Island with
crocodile hype is just to the west of Belitung Island. No one goes there to dive, but the beaches are quite nice. I circled it in red. They are about 3000 km apart.
FWIW:
1. Before Indonesia, I called Florida home. In the last ten years about 100 people were killed by far less aggro North American alligators. Somehow we manage.
2. You may want to rethink living in Phuket as
Dog attacks are a serious business in Thaliand. You may also want to google that. (Sarcasm)