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
4%
92%
4%
0%
25
flagGreece
3%
85%
7%
3%
27
flagSingapore
5%
82%
10%
2%
39
flagthe United Arab Emirates
10%
82%
3%
3%
28
flagCanada
7%
80%
9%
2%
71
flagGermany
9%
78%
5%
4%
298
flagPoland
9%
77%
6%
4%
23124
flagAustralia
8%
76%
13%
2%
135
flagUnknown
6%
76%
11%
4%
63
flagSwitzerland
13%
76%
7%
2%
38
flagthe United Kingdom
9%
74%
9%
4%
441
flagIndonesia
9%
72%
4%
0%
22
flagIndia
8%
70%
14%
4%
1065
flagthe United States
9%
69%
13%
5%
1388
flagthe Netherlands
10%
68%
13%
6%
29
flagMalaysia
7%
67%
19%
3%
56
flagAustria
15%
64%
15%
2%
45
flagNigeria
7%
63%
15%
7%
57
flagthe Philippines
15%
61%
20%
1%
114
flagPakistan
19%
58%
13%
6%
105