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Baltic sea anomaly

interpretations of an indistinct sonar image taken by P. Lindberg and D. Åsberg while treasure-hunting on the floor of the northern Baltic Sea at the center of the Bothnian Sea in June 2011

Pronunciation
/ˈbɔltɪk si əˈnɑməli/
/ˈbɔːltɪk siː əˈnɒməli/