Deep Diving
Definition
Deep diving refers to the ability of certain penguin species to reach extraordinary depths in pursuit of prey. Emperor penguins hold the record, diving to over 500 metres and holding their breath for more than 20 minutes. These dives are possible thanks to high concentrations of myoglobin in the muscles, collapsible lungs that resist pressure damage, and a reduced heart rate that conserves oxygen. Deep diving allows access to prey resources unavailable to shallower-diving competitors.
Related Terms
The keel is an enlarged ridge on the sternum (breastbone) that anchors the powerful pectoral muscles penguins use for swimming.
Penguin flippers are highly modified wings that have evolved into rigid, flat paddles optimised for underwater propulsion rather than flight.
Pelagic refers to the open ocean environment, far from shore and the sea floor.
Related Species
Species where deep diving is especially relevant.
Frequently Asked Questions
What does deep diving mean in penguin biology?
Deep diving refers to the ability of certain penguin species to reach extraordinary depths in pursuit of prey. Emperor penguins hold the record, diving to over 500 metres and holding their breath for more than 20 minutes. These dives are possible thanks to high concentrations of myoglobin in the muscles, collapsible lungs that resist pressure damage, and a reduced heart rate that conserves oxygen. Deep diving allows access to prey resources unavailable to shallower-diving competitors.
Keep learning
Glossary entries define the language. FAQ answers common questions; guides carry the longer Survival Lab arguments.
More in behaviorWhere this definition comes from
Reference bodies behind the behavior terminology. Links last checked August 5, 2026.
- Smithsonian Ocean Portal - Penguin biology, anatomy, and breeding explainers.
- British Antarctic Survey - Antarctic penguin ecology, diving, and sea-ice context.
- Penguins International - Species explainers and conservation context focused on penguins.