What color is octopus blood?

red
blue
green
yellow
Both squids and octopuses have blue blood. They use an oxygen-carrying molecule in their blood called hemocyanin that contains copper. In cold conditions with low oxygen pressure, hemocyanin oxygen transportation is more efficient than haemoglobin oxygen transportation.
Kasia
0
Correct this question
7
Very interesting!
reach: rather globalanimalsbloodchemistrycolorsnatureoctopusessea animalszoology

Answers by country

red
blue
green
yellow
answers
flagUkraine
6%
87%
3%
3%
31
flagGreece
3%
85%
7%
3%
28
flagRepublic of Ireland
4%
84%
8%
4%
25
flagSingapore
5%
82%
10%
2%
39
flagthe United Arab Emirates
10%
82%
3%
3%
29
flagGermany
9%
78%
5%
4%
333
flagCanada
6%
78%
10%
4%
74
flagPoland
9%
77%
6%
4%
23452
flagAustralia
8%
77%
12%
2%
149
flagUnknown
6%
76%
11%
4%
63
flagthe United Kingdom
9%
75%
9%
4%
484
flagSwitzerland
16%
74%
6%
2%
43
flagIndia
8%
70%
14%
4%
1109
flagthe United States
8%
69%
13%
5%
1422
flagMalaysia
6%
68%
18%
3%
58
flagAustria
14%
68%
14%
2%
50
flagthe Netherlands
12%
67%
12%
6%
31
flagNigeria
7%
65%
14%
6%
64
flagthe Philippines
15%
62%
19%
1%
120
flagPakistan
17%
58%
12%
8%
116