| Species | Locality | Notes |
|---|---|---|
| Holothuria (Selenkothuria) moebii Ludwig, 1883 | Ao Khoei, 11 Sept, 2000, at mid-low tide level | Colour: All black Habitat: in U-shaped burrows in sand |
| Holothuria (Metriatyla) timana Lesson, 1830 | Tung Nang Dam 7 Sept., 2000 | Colour:dark grey with transverse black (short) mark enclosing white - white below Habitat: at low tide on seagrass beds. |
| Holothuria (Halodeima) atra Jaeger, 1833 | Tung Nang Dam 7 Sept., 2000 | Colour: uniformly black in colour Habitat: at low tide on seagrass beds. |
| Holothuria (Thymiosycia) hilla Lesson, 1830 | Kho Ra, beach, 13 February, 2000 | |
| Holothuria (Semperothuria) cinerascens (Brandt, 1835) | Ao Khoei, 11 September, 2000 | Colour: White all over. Habitat: stuck fast to underside of rocks in low intertidal zone. |
| Archaster typicus Muller & Troschel, 1840 | Tung Nang Dam, Khura Buri, March, 2000 | Seagrass beds and sandy subtidal areas |
| Astropecten monacanthus Sladen, 1883 | Praphas Beach, washed up, | |
| Echinodiscus tenuissimus (L. Agassiz, 1847) | Praphas Beach, washed up, | This is a common species of the lower intertidal to subtidal zones |