Male Sperm Whales Sound Ocean’s Loudest Clangs, Study Finds
New research shows male sperm whales produce the loudest known animal communication signals, emitting slow, low-frequency clangs that can be heard by other whales up to about 70 kilometers away. Hydrophone recordings from the Seychelles and other sites reveal a distinct rhythmic pattern with 5–10 second gaps. The sounds are produced by the whales’ massive nasal structures (phonic lips), but scientists still don’t know the exact purpose—possibilities include attracting mates or deterring rivals—so further study is needed.