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Arabellids are never tubiculous. They may be parasitic as juveniles and become free-living as adults. The free-living forms are burrowers, moving slowly through sand or mud. The parasitic ones infect echiuroids and members of the other polychaete families such as the Onuphids, Eunicids, Syllids and Terebellids. The free-living ones are predaceous carnivores or highly selective deposit feeders.
Species found in Singapore include:
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