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%
90%
3%
1%
64
flagRepublic of Ireland
4%
84%
6%
4%
45
flagRussia
3%
80%
8%
3%
83
flagSingapore
7%
79%
7%
3%
53
flagPoland
9%
78%
6%
4%
25898
flagGermany
9%
78%
5%
3%
1079
flagCanada
11%
77%
8%
3%
118
flagthe United Kingdom
9%
76%
8%
4%
661
flagAustralia
7%
76%
11%
3%
208
flagUnknown
6%
76%
11%
4%
63
flagthe Netherlands
10%
76%
8%
4%
46
flagAustria
11%
74%
8%
2%
139
flagthe United Arab Emirates
19%
74%
2%
2%
47
flagthe United States
9%
70%
13%
5%
1707
flagIndia
9%
69%
14%
4%
1466
flagMalaysia
4%
69%
17%
4%
81
flagSwitzerland
17%
66%
10%
5%
119
flagNigeria
13%
62%
14%
6%
168
flagthe Philippines
15%
60%
19%
3%
155
flagPakistan
18%
55%
15%
7%
158