Monster cardinal-fish (Jaydia melanopus), first described by Weber, 1911 is a small fish in the family Apogonidae (order Apogoniformes). Adults typically reach 11.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 2 to 160 metres. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. The species active primarily at night.
Dorsal spines (total): 8; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 9. : short and / or deep; Cross section: compressed.
Behavioural data for Monster cardinal-fish is currently being reviewed.
Mouthbrooders . Distinct pairing during courtship and spawning .
Marine; benthopelagic; depth range 2 - 160 m , usually 2 - 50 m . Tropical
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