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The megalops is a larval stage in the development of most crabs, appearing after the zoea stage. During the megalops stage, the larva has developed legs and abdominal appendages, a relatively long abdomen, and large eyes. This stage is also referred to as a megalopa. Some crustaceans may have an intermediate stage called a metazoea between the zoea and megalops stages. Malacostracans, a large group of crustaceans that includes crabs, lobsters, and shrimp, often have complex life cycles that can include larval stages.123

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