Goniobranchus annulatus (Eliot, 1904)

(Figure 6 A)

Material examined. Six specimens. MHN-YT290, ZDD, 23 Feb. 2012, 1 m, 9mm; MB28-004538, ZRP, 0 6 May 2012, 1m, 30mm, collected by S. Bruck; MB28-004549, ZRP, 20 May 2012, 2m, 30mm, collected by S. Bruck; MB28-004560, ZRP, 0 4 Jun. 2012, 1 m, 28mm, collected by A. Roseblum; MB28-004608, ZRP, 17 Aug. 2012, 1 m, 34mm, collected by A. Pouris; MB28-004681, BL, 14 May 2012, 0.5m, 14mm.

Habitats. Subtropical tidal reefs, rocky reefs and seagrass.

Occurrences. Zavora and Barra.

Geographic distribution. Indian Ocean. Introduced in the Mediterranean Sea (Mytilineou et al. 2016) Thailand (Debelius 1996), Gulf of Oman (Debelius 1996; Fatemi & Attaran-Fariman 2015), Madagascar (Gosliner et al. 2008), Tanzania (Eliot 1904c), South Africa (Gosliner 1987) and Mozambique.