
Hidden Depths: Blue Whale Calls May Evade Orcas Over Long Distances
A 2025 Marine Mammal Science study shows blue whales vocalize at ultra-low frequencies that travel far through seawater, but killer whales hear best at higher frequencies; beyond roughly a kilometer, orcas may largely miss the calls, giving blue whales a private long-range communication channel that could aid predator avoidance and mating, though increasing ocean noise could mask signals.













