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Published online by Cambridge University Press: 06 October 2025
Sabellaria miryaensis is capable of growing massive reefs of several meters long in the subtidal area. However, no occurrence of S. miryaensis has been recorded in the Arabian Sea since its original description in 1990. This manuscript presents a new record of S. miryaensis in the Bay of Bengal, confirming its presence there. In addition, details on its ecology, including environmental parameters and the associated benthic biodiversity of S. miryaensis reefs are included. Four 1-m2 quadrat samples were collected from subtidal sabellariid reefs (∼15 m depth) off Gopalpur in March 2024, and associated macrofauna were preserved in 5% formalin for taxonomic analysis. Water parameters (temperature, salinity, and pH) and sediment texture were measured using standard field and laboratory protocols. The reef built by this species supports high macrofaunal and meiofaunal diversity, particularly polychaetes and other invertebrates. Morphological analysis confirms its identity with minor intraspecific variations. The reef also serves as a critical habitat for commercially important fish, underscoring its ecological and economic value. These findings highlight the need for further ecological assessments and conservation of sabellariid reef ecosystems in Indian coastal waters.