These creatures are living in Deep Ocean and they possess blue blood instead of red because they have lack of haemoglobin but in place of that they have hemocyanin which turns the blood blue.
They are the weirdest marine animal which has a pigment called vanabin in their blood which makes their blood yellow in colour.
Squid is a sea creature which has a lack of haemoglobin that is why their blood colour is anywhere in between dark blue to reddish blue colour.
Spider is a normal land insect which relies on hemocyanin to carry oxygen which makes their blood blue-ish in colour.
Octopuses are also deep sea creature which lives in cold environment. Their blood is also blue in colour because of the presence of hemocyanin.
Lobsters are one of the scariest marine animals. It is said that their blood is colourless and it turns blue when it comes in contact with oxygen.
They are shell like creatures which consists hemerythrin which makes their blood light yellow in colour.
Antarctic Icefish also have colourless blood because of lack of haemoglobin consistency.