We’ve collected data for over 17 years from over 6,700 surveys and have found that aquarium fish populations are generally stable and increasing in West Hawai'i where, again, most of these aquarium fish are collected. The populations of Yellow Tang and Kole – which are the two most heavily collected species – are not declining. In recent years, they’ve both been increasing both in the protected areas and in open areas. [...] If you define sustainable as the numbers remaining the same and/or increasing, then they’re sustainable.