A University of Washington researcher published a finding in 2025 that stops you cold: blue whales sing at frequencies so deep that killer whales, their only natural predator, cannot hear them at all — their calls are invisible to orca ears beyond one kilometre

A blue whale can send a call through the ocean with a voice deeper than almost any animal sound on Earth. The strange part is not only that other blue whales can hear it. It is that killer whales, the only known natural predator of blue whales, may largely miss the message. The finding is [...] The post A University of Washington researcher published a finding in 2025 that stops you cold: blue whales sing at frequencies so deep that killer whales, their only natural predator, cannot hear them at