The 17th Conference of Parties to the Convention on International Trade in Endangered Species of Wild Fauna and Flaura (CITES) decided to expand the species of sharks protected by CITES controls, including silky shark (Carcharhinus falciformis), thresher sharks (Alopias spp.) and all nine devil ray species (Mobula spp.) within Appendix II. Listing of devil rays entered into effect on 04 April 2017, while silky and thresher shark listing was subject to a 12 month delay, entering into effect 4 October 2017.
For more information see the press release here, or the sharks and manta rays page here.