Biology unknown . Inhabits coastal and offshore reefs, rubble areas and low-profile coral patches . Found in sheltered reefs with rich coral and algae mix along upper parts of slopes. Occurs in small groups of mix sexes but females outnumber males greatly . Males attract females by flashing neon-like colors an hour before sunset (true for most Paracheilinus .
Dorsal spines (total): 9; Dorsal soft rays (total): 11; Anal spines: 3; Anal soft rays: 9; Vertebrae: 25. Body and head orange; pale yellowish orange ventrally; head with 1-4 dark horizontal lines. Anterior dorsal rays not prolonged as filaments. Posterior soft portions of dorsal and anal fins angular. Predorsal scales 5. Lateral line interrupted . Seven violet to red stripes on body in life, the upper five extending full length of body; caudal fin of adult males emarginate .: fusiform / normal; Cross section: compressed.
Behavioural data for Angular flasher is currently being reviewed.
Diet information for Angular flasher is currently being compiled.
Oviparous, distinct pairing during breeding .
Marine; reef-associated; depth range 10 - 40 m . Tropical Central Pacific: Philippines.
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