How do great hammerheads handle temperature swings?

Thermal hustle: hammerheads keep hunting across temperatures

Biologging data suggest great hammerhead sharks “don’t slow down” when ocean temperatures shift, unlike most predators that tend to reduce activity as conditions change. The finding points to a hunting strategy researchers describe as a “thermal hustle,” where the sharks are able to maintain peak hunting performance across wide temperature swings.

Why it matters: shifting ocean temperatures are expected to be a major stressor for marine ecosystems. If typical predators slow their movement, prey dynamics can shift—potentially altering food-web balance, migration, and breeding success. The new result implies that at least some top predators may be more resilient than previously assumed, because their capacity to hunt is not tightly constrained by temperature in the same way.

The work also helps explain how predators with broad thermal ranges can remain effective even as climate-driven warming and marine heat events intensify. That resilience could affect how quickly ecosystems reorganize after temperature anomalies.

Key takeaway points:

• Most predators usually reduce performance when waters warm or cool.
• Great hammerheads appear to sustain hunting behavior despite temperature changes.
• The behavior is consistent with a “thermal hustle” adaptation.
• Such predator resilience could influence longer-term ecosystem stability under climate change.

Overall, the study reframes thermal limits for a major marine predator: instead of assuming temperature swings will automatically reduce top-down predation, the data indicate some sharks may keep functioning as hunters across changing thermal conditions. That difference could matter for forecasting ecosystem responses in a warming ocean.