Ahermatypic corals (Scleractinia: Dendrophylliidae, Oculinidae and Rhizangiidae) recorded from submarine caves in Hong Kong Author Lam, Katherine Author Morton, Brian Author Hodgson, Paul text Journal of Natural History 2008 2008-03-31 42 9 - 12 729 747 http://dx.doi.org/10.1080/00222930701862724 journal article 10.1080/00222930701862724 1464-5262 5224891 Tubastrea sibogae ( van der Horst, 1922 ) ( Figure 2K–L ) Dendrophyllia sibogae van der Horst, 1922:56–57 , Plate VIII, Figs 19–20 Tubastrea sibogae Ogawa & Takahashi, 1993:99 , Plate 1, Figs 9–10, Plate 3, Figs 1 – 14, Plate 6, Figs 1–4 Figure 3. Tubastrea diaphana collected from Conic Island cave being grazed by three individuals of Aeolidiella sp. The white area of the skeleton is the grazed area. One Aeolidiella is on the top of the colony, the second is on the bottom and the third one was dislodged during collection. Description Dendroid (bushy), colonial corallum. Main branch is not obvious. Extra-tentacular budding occurs near the base of old corallites. Colony size ranges from 15 mm to 40 mm in length and width and 15–30 mm in height. Corallite circular to slightly oval with a diameter ranging from 9.6–11.2 mm . Septal order is hexameral and in four cycles. Septal size, in a descending order, is S 1 .S 2 .S 45 S 3 . Columella is deep, thin and spongy. Living colony is dark green. Type locality Between Nusa Besi and the N.E. point of Timor, depth 27–54 m ; Haingsisi, Samau- Island, depth up to 36 m . Distribution Indonesia , Japan ( Ogawa and Takahashi 1993 ) and Conic Island marine cave, Hong Kong (this study).