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Macro-invertebrates are small organisms that do not have a backbone. They are all insects, arthropods, arachnids. Invertebrates means; In, not and vertebrate, vertebrae (backbone) essentially meaning, no vertebrae. These organisms instead have an exoskeleton, a hard shell covering their body to protect their organs. The exoskeleton is made of chiton (protein) that has. Not all macro invertebrates have an exoskeleton some, like the jellyfish, do not

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