Which worm Like living in ponds and streams is why drinking blood of other creatures
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Answer: Squid, Octopus, Horseshoe crab and certain insects
Explanation: Squid, Octopus, Horseshoe crab and certain insects and their larval stages have blue coloured blood. The reason for the blue colour is that they have the protein 'Haemocyanin' whereas the vertebrates have 'Haemoglobin'.
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