Description: English: Reefs of Sabellaria alveolata on rocks at the Natural Reserve of Torre Flavia (Ladispoli), Latium, Italy Sabellaria alveolata are gregarious worms that builds tubes from sand or shell fragments. Tubes are often densely aggregated to form a honey comb pattern. They may form large reefs. Date: 1 September 2021, 10:55:21. Source: Own work. Author:
Albarubescens.
