* Phestilla sp. 1 Figure 21F

Material examined.

Two specimens 8-14 mm, CB.

Ecology.

Exclusively on its prey, the scleractinian coral Goniopora in coral reef habitats. Locally observed to be predating colonies of Goniopora fruticosa Saville-Kent, 1891. Depth 2-8 m.

Distribution.

Phestilla sp. 3 (Gosliner et al. 2008) is recorded from Tanzania, the Philippines, Indonesia, Japan, Hong Kong, Papua New Guinea, Australia, and the Marshall Islands. Here representing a first record for Thai waters.