Limited evidence about climate impacts exists for valuable non-food aquatic materials. Ocean warming and acidification harm red coral   and communities hosting black coral , both used for jewellery . While no-take MPAs  enhance red-coral structural complexity, they only weakly compensate for warming effects . Antipatharian spp. are not well studied or monitored . Acidification and warming negatively impact pearl oysters . For example, projected climate impacts for 2035 would decrease the average net present value of French Polynesia's pearl aquaculture industry by 29.1% compared with the present . Climate impacts on ornamental species sought by aquarists have not been well studied .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report