How do whales communicate over long distances?

Whales communicate over long distances using low-frequency vocalisations that travel efficiently through water. Baleen whales, like blue whales, produce deep, resonant sounds called songs that can carry for hundreds of kilometres. These vocalisations convey information about location, mating readiness, or potential threats. The density and sound-conducting properties of seawater allow whales to stay connected, even across vast oceanic distances, making their communication system one of the most remarkable in the animal kingdom.