Finless Porpoise
As their name suggests, these small cetaceans lack a dorsal fin. They produce extremely high-frequency clicks around 100-150 kHz for navigating Asia’s murky coastal waters. Finless porpoises rely heavily on echolocation since visibility in their habitat often approaches zero. Their body shape optimizes maneuverability rather than speed. They navigate complex estuarine environments where rivers meet oceans. Their acoustic abilities compensate for their limited visual range in sediment-filled, turbid waters.