Spotted sweetlips in Palau Photo: Richard Brooks/ The Pew Charitable Trusts
Despite the threat of tourist numbers falling, Palau is standing firm in its campaign to protect its environment and culture.
The Palau Pledge requires tourists to sign an agreement to respect and protect the island's natural resources.
According to the President of Palau Tommy Remengesau, the pledge will remain an immigration requirement.
He said the government recognised the need to make visitors accountable for their actions and to avoid environmental damage and cultural disruption.
Outrage has grown among residents over rubbish on beaches and tourists capturing turtles in order to take selfies with them.