Aphotic
Zone
O
B
G
I
G
G
N
I
O
N
B
O
G
O
B
G
O
B
N
N
G
N
I
I
O
B
I
I
B
Size:
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Start
O
History
Start
O
B
G
I
G
G
N
I
O
N
B
O
G
O
B
G
O
B
N
N
G
N
I
I
O
B
I
I
B
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