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Sperm whale swimming upside down with closed eyes | Sri Lanka

Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results. Notice that the sperm whale has closed her eyes.

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Filename: sperm-whale-swimming-upside-down-in-blue-water_201104_0630.tif
Copyright: Copyright Tony Wu. All rights reserved. No duplication in any form without prior written consent.
Image Size: 5184x3456 / 51.3MB; https://www.photoshelter.com/support/license#rm; https://www.tony-wu.com/contact-tony-wu; Physeter macrocephalus Physeteridae Physeter catadon Mammalia Marine Mammal Toothed Whale CITES Appendix 1 Animalia Odontocete Sri Lanka Cetartiodactyla Indian Ocean Cachalot Chordata Mirissa Odontoceti Cetacea Sperm Whale Vulnerable: IUCN Red List
Contained in galleries: Sperm Whales, Marine Life | Sri Lanka

Inquisitive adult female sperm whale in the Indian Ocean, swimming underneath me to check me out using sonar. Sperm whales seem to swim upside-down frequently when they use sonar to investigate objects above them. Perhaps this position gives them optimal results. Notice that the sperm whale has closed her eyes.