Summary[edit] Description: English: The hydroid Sertularella gayi, fertile. Date: 19 June 2015, 11:17:48. Source: Own work. Author: Bernard Picton. Camera location54° 03′ 56.16″ N, 4° 44′ 03.12″ WView all coordinates using: OpenStreetMap 54.065600; -4.734200.