Take a snorkeling boat tour to Turtle Point, Shark Point, and Fish Garden

Get PADI Open Water certified (RM 1,100 / ~$245 for 3 days; Turtle Bay Divers, Bubbles, Monkey Dives)

Kayak around the island (RM 20–30/hour)

Snorkel right off Long Beach or Coral Bay — turtles are almost guaranteed

Sunset from Coral Bay beach — the west-facing beach gets golden light