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Antarctic Ocean
24
Antarctica
Biology--Field work
Scientists
22
Sea ice
13
Research vessels
11
Scuba divers
8
Ships
7
Antarctic Peninsula
5
Deep diving
5
Palmer Station
5
Adelie penguin
4
Pygoscelis adeliae
4
Ice-breaking vessels
3
Underwater photography
3
Ad??lie penguin
2
Applied ecology
2
Icebergs
1
Measuring instruments
1
Plankton nets
1
Plankton--Collection and preservation
1
Sea Ice
1
Snow
1
Trawls and trawling
1
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