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
flagRepublic of Ireland
0%
92%
7%
0%
14
flagthe United Arab Emirates
8%
84%
4%
4%
25
flagSingapore
5%
81%
10%
2%
37
flagCanada
8%
80%
8%
3%
61
flagPoland
9%
77%
6%
4%
21354
flagGermany
8%
77%
4%
5%
123
flagUnknown
6%
76%
11%
4%
63
flagSwitzerland
9%
76%
9%
4%
21
flagMexico
7%
76%
15%
0%
13
flagthe United Kingdom
9%
72%
11%
4%
353
flagIndonesia
9%
71%
4%
0%
21
flagIndia
7%
70%
15%
4%
794
flagthe United States
9%
69%
14%
5%
1250
flagAustralia
11%
69%
16%
3%
97
flagthe Philippines
13%
65%
18%
1%
93
flagMalaysia
6%
65%
23%
4%
43
flagthe Netherlands
14%
61%
14%
9%
21
flagNigeria
9%
60%
18%
4%
43
flagSpain
6%
60%
6%
13%
15
flagPakistan
16%
57%
15%
7%
83