Prawns have an open circulatory system and have jointed legs. To which phylum does it belong to?
Arthropoda
Prawns belong to the phylum Arthropoda. Arthropods are invertebrate animals with an open circulatory system and paired jointed legs. Some familiar examples of this phylum are prawns, butterflies, cockroaches, houseflies, spiders, scorpions, and crabs.