Very special thanks for the first photo of Pseudocoris petila to the ichthyologist Allen, G.R.
Pseudocoris is a genus of wrasses native to the eastern Indian Ocean and the western Pacific Ocean.
Found in outer reef crests in small aggregations. Females occur in small groups, and usually a male is nearby. Feeds on zooplankton
Inhabits sand, rubble and weed bottom, with scattered rocky boulders in 10-16 m depth
Referenz: Allen, G.R. and M.V. Erdmann, 2012. Reef fishes of the East Indies. Perth, Australia: Universitiy of Hawai'i Press, Volumes I-III. Tropical Reef Research.