Rogadius welanderi

Batu Lubang Kecil, Lembeh. Is also a tentative ID. It could be Onigocia spinosa but does not seem like it..

The Welander's flathead

Marine; reef-associated; non-migratory; depth range 6 - 40 m (Ref. 9790). Tropical; 10°N - 15°S
Distribution
Indo-Pacific: Reunion east to American Samoa, south to Australia.

Size
Max length : 13.0 cm TL male/unsexed; common length : 8.0 cm TL male/unsexed;

Short description
Dorsal spines (total): 9; Dorsal soft rays (total): 11; Anal spines: 0; Anal soft rays: 11. Preopercle with a small antrorse spine. Infraorbital and suborbital ridges bearing many.. more