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At each location, sediment cores were collected both adjacent to rocky reefs and 15 m away on sandy substrates. Macrofaunal organisms were sorted, identified to the lowest practical taxonomic level, and quantified, while sediment samples were analysed for grain-size composition. The dataset includes species occurrence and abundance records together with sediment granulometry data, providing information on the composition, diversity, and spatial variability of soft-sediment benthic communities. 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