This beautiful wrasse, called Cirrhilabrus aff. lubbocki, which is quite similar to the dwarf wrasse Cirrhilabrus lubbocki, was photographed by François Libert on 29 July 2018 in the waters around Pura Island, Alor, East Nusa Tenggara, Indonesia.
The abbreviation "aff." stands for "species affinis" and means that (in this case) it is an undetermined species, but it is very similar to a known species (in this case Cirrhilabrus lubbocki).
As Cirrhilabrus lubbocki is regularly sold in specialized shops, it is very likely that specimens of Cirrhilabrus aff. lubbocki live in one or the other home aquarium instead of Cirrhilabrus lubbocki.
We would be very pleased to hear any comments or experiences with keeping such specimens.
François Libert is one of the authors of the great guide for the identification of sea squirts, fish, reptiles and mammals with the French names "Découvrir la vie sous-marine, Mer Rouge, océan India, océan Pacifique" translated "Discover the underwater life of the Red Sea, the Indian Ocean and the Pacific Ocean".
A great book with even better photos!