Sperm whales in the Mediterranean Sea appear to be evolving new dialects, with some whales developing regional "accents" or adopting new calls while still using old ones. Audio recordings suggest that some whales may be becoming "bilingual" by adapting to multiple dialects, while others may be developing distinct dialects on separate sides of the Mediterranean. The evolution of these dialects is being studied, with some research indicating that different dialects are emerging in different areas of the sea.