Research Reveals How Sharks React To Human Activity

New study shows juvenile great white sharks can detect swimming sounds from up to 100 feet away.

Updated on Oct. 16, 2026 in Swimming

Isometric editorial illustration of a submerged hydrophone device near a shark silhouette, representing marine research into shark sensory perception. — A new research study confirms that juvenile great white sharks can identify and differentiate human activities, such as swimming, by sound. AI Illustration. Upload story photo >

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Does learning that sharks identify humans by sound make you feel safer when swimming in the ocean?

Researchers developed a specific hearing test to determine how sharks perceive human activities in the ocean. The study finds that great white sharks differentiate between sounds from freestyle swimming, kayaking, and paddling.

Why it matters

Understanding how sharks use sound and vibration as sensory tools helps explain how they identify people in the water. This knowledge may clarify the behavioral patterns behind interactions between sharks and humans.

Juvenile sharks can detect human activity from 100 feet away. Worldwide, there are 60 to 65 unprovoked shark bites and approximately 6 fatalities per year.

The players

Shark Lab

The Shark Lab is a California-based research institution dedicated to the study of shark behavior and ecology.

The details

Using multichannel hydrophones to record underwater sounds, scientists observed that sharks were more likely to approach sounds associated with freestyle swimming. In contrast, they frequently ignored paddling sounds as background noise, while kayaking produced gentle, continuous audio that elicited minimal interest.

Annual average of 60 to 65 unprovoked shark bites worldwide.

Season Trajectory

This study advances the Shark Lab's ongoing sensory research program by isolating specific acoustic triggers for shark behavior. The findings provide a foundation for future modeling of shark-human interactions along the California coast.

Swimmers in areas with high shark activity should note that specific acoustic signatures like freestyle swimming are more likely to attract attention than paddling. These findings provide a data-backed reason to remain aware of local water conditions.

The takeaway

Sharks utilize sound as a primary mechanism to distinguish between potential prey and non-threatening environmental noise. Recognizing these patterns can help ocean users better understand the auditory cues they broadcast while in the water.