* Doris cf. immonda Risbec, 1928 Figure 13G

Material examined.

One specimen 5 mm, HF.

Ecology.

Under reef rubble and on rocks in coral reef habitats. Cryptic on its orange prey sponge. Depth 6-12 m.

Distribution.

Doris immonda is known across the Indo-Pacific including Japan (Rudman 2000a), Australia (Nimbs and Smith 2016), Papua New Guinea, New Caledonia, Hawaii (Gosliner et al. 2008), and the Pacific coast of Costa Rica ( Camacho-García and Gosliner 2008b). Here representing a first record for Thai waters.

Remarks.

Broadly matches the description and variations highlighted by Valdés (2002); however, like specimens of D. cf. granulosa, specimens documented from Koh Tao differ in colouration from Doris immonda . The dorsal colour is a bright orange with numerous rounded or conical tubercles covering the surface, many capped in white. The Y-shaped marking between the rhinophores to in front of the gills is made up of purple tubercles and the rhinophore club is a pale brown with white edges of lamellae. As above, this variation in colouration may yet be considered to be within what can be found in Doris immonda Risbec, 1928.