POMACENTRIDAE Dascyllus trimaculatus (photo by Ukkrit Satapoomin) Dascyllus trimaculatus (Rüppell, 1830) Three-spot Dascyllus D XII, 14-16; A II, 14-15; P1 19-21; LLp 17-19. Body deep, compressed. Posterior margin of preopercle serrate. Suborbital scaled, with serrate ventral free margin. Teeth on jaws conical, muliserial; teeth of outermost row larger than those of inner rows. Caudal fin emarginage, with rounded lobes; two conspicuous projecting spinelike rays at upper and lower edges of caudal-fin base. Color: head, body and fins black or gray, with a white spot on dorsal part of side of body, as well as a similar-colored spot on forehead (these white spots may obscure in large adult); body of large individual light gray, with dark-margined scale pockets forming reticulated pattern. Size: 11.0 cm SL. Distribution: Indo-West Pacific. Remarks: found coral and rocky reefs; juveniles frequently symbiotically associated with various sea anemones.