No, a crab is not a decomposer. Crabs are primarily scavengers and predators. They feed on dead animals, plants, and other organic matter, but they do not break down this material into simpler substances like decomposers do. Decomposers, such as bacteria and fungi, play a crucial role in breaking down dead organisms and waste materials into nutrients that can be reused by plants and other organisms in the ecosystem. While crabs help in the process of breaking down larger pieces of organic matter, they are not classified as decomposers.
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