Wikipedia
Holocentrinae
Holocentrinae is a subfamily of the Holocentridae fish. Two genera of Squirrelfishes of the subfamily Holocentrinae are found in the Indo-Pacific region: Neoniphon (Flammeo of recent authors) and Sargocentron (Adioryx of most recent authors). A total of 19 species of these two genera occur in the Indian Ocean west of the southern tip of India
They are typically known as squirrelfish. They are nocturnal.