Armina occulta Mehrotra, Caballer & Chavanich, 2017 Figure 18L

Material examined.

Two specimens 65-72 mm, SN.

Ecology.

Exclusively known from soft sediment habitats outside the coral reef where it feeds on the sea pen Virgularia sp. Depth 14-22 m.

Distribution.

Known from the western Pacific including Indonesia (Yonow 2017), the Philippines (Koehler 2002), Australia (Hatton 2019), Papua New Guinea (Adams 2000), and Palau (Gosliner et al. 2008). Known from the Gulf of Thailand (Mehrotra et al. 2017). Koh Tao is the type locality of this species.