Sei Whale

   Shepherd's Beaked Whale

   Short-Beaked Common Dolphin

   Short-Finned Pilot Whale

   South Asian River Dolphin

   Southern Bottlenose Whale

   Southern Right Whale

   Southern Right Whale Dolphin

   Sowerby's Beaked Whale

   Spade-Toothed Whale

   Spectacled Porpoise

   Sperm Whale

   Spinner Dolphin

   Stejneger's Beaked Whale

   Striped Dolphin