Protected

Sperm whales are listed or protected under a number of legal frameworks: 

• The IUCN Red List of Threatened Species lists the sperm whale as being "Vulnerable"
• The United States Endangered Species Act list sperm whales as "Endangered" 
• Listed under Appendix I and Appendix II of the Convention on the Conservation of Migratory Species of Wild Animals (CMS) as sperm whales have been categorized as being in danger of extinction throughout all or a significant proportion of their range (Appendix I) and they have an unfavourable conservation status or would benefit significantly from international co-operation organised by tailored agreements (Appendix II)
• Sperm whales are covered by the Specially Protected Areas and Wildlife (SPAW) Protocols in the Wider Caribbean.                                                                                                                                                (http://www.thespermwhaleproject.org/threats/)

            " The International Whaling Commission manages sanctuaries for all species in the Indian and Southern Oceans. However, no scheme for managing Sperm Whale populations is in place. Moreover, many range states are not members of the International Whaling Commission.

  Regional subpopulations of Sperm Whales exist, and there has been an apparent lack of recovery in some areas or even continued decline (e.g., the Mediterranean (Reeves and Notarbartolo di Sciara 2006). Therefore, further assessments of the status of Sperm Whales should be conducted at the subpopulation level."--Red List