Monster Cardinalfish, Jaydia melanopus (Weber 1911)

Other Names: Monster Cardinal-fish, Spindle-egg Cardinalfish

Monster Cardinalfish, Jaydia melanopus. Source: Australian National Fish Collection, CSIRO. License: CC By Attribution-NonCommercial

A yellowish brown to silvery grey cardinalfish with a broad dusky band below the first dorsal fin, a black spot or blotch at on the body at the rear of the dorsal and anal fins that may form an indistinct band, and dusky fins.

Cite this page as:
Bray, D.J. 2021, Jaydia melanopus in Fishes of Australia, accessed 23 Jul 2024,

Monster Cardinalfish, Jaydia melanopus (Weber 1911)

More Info


Kimberley coast, Western Australia, to northern Cape York, Queensland. Elsewhere the species occurs in New Guinea.


Dorsal fin VI + I,9; Anal fin II, 9.


The specific name is from the Greek melanopus (= black feet) in reference to the black pelvic fins.

Species Citation

Apogon melanopus Weber 1911, Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 34: 28, fig. 4. Type locality: Sungi Barkai at Wardakau, Aru Island, Indonesia.


Bray, D.J. 2021


Atlas of Living Australia

Monster Cardinalfish, Jaydia melanopus (Weber 1911)


Allen, G.R. 1985. A new species of cardinalfish (Apogonidae) from northern Australia and the Aru Islands. The Beagle. Occasional Papers of the Northern Territory Museum of Arts and Sciences 2(1): 11-15 figs 1-3 (described as Apogon fusovatus) See ref at BHL

Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Perth : Western Australian Museum 292 pp. 106 pls. 

Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp. 

Allen, G.R. & Morrison, S. 1996. A new species of cardinalfish (Apogonidae) from northern Australia. Records of the Western Australian Museum 17: 439-442 

Allen, G.R. & Swainston, R. 1988. The Marine Fishes of North-Western Australia. A field guide for anglers and divers. Perth, WA : Western Australian Museum vi 201 pp., 70 pls. 

Gloerfelt-Tarp, T. & Kailola, P.J. 1984. Trawled Fishes of Southern Indonesia and Northwest Australia. Jakarta : Dir. Gen. Fish. (Indonesia), German Tech. Coop., Aust. Dev. Ass. Bur. 406 pp. 

Kuiter, R.H. & Kozawa, T. 2019. Cardinalfishes of the world. New ed. Seaford, Victoria : Aquatic Photographics, and Okazaki, Aichi, Japan : Anthias, Nexus: 1-198.

Larson, H.K., Williams, R.S. & Hammer, M.P. 2013. An annotated checklist of the fishes of the Northern Territory, Australia. Zootaxa 3696(1): 1-293 

Larson, H.K. & Williams, R.S. 1997. Darwin Harbour fishes: a survey and annotated checklist. pp. 339-380 in Hanley, H.R., Caswell, G., Megirian, D. & Larson, H.K. (eds). The Marine Flora and Fauna of Darwin Harbour, Northern Territory, Australia. Proceedings of the Sixth International Marine Biology Workshop. Darwin : Museum and Art Gallery of the Northern Territory 466 pp. 

Mabuchi, K., Fraser, T.H., Song, H., Azuma, Y. & Nishida, M. 2014. Revision of the systematics of the cardinalfishes (Percomorpha: Apogonidae) based on molecular analyses and comparative reevaluation of morphological characters. Zootaxa 3846(2): 151–203 

Russell, B.C. and W. Houston, 1989. Offshore fishes of the Arafura Sea. The Beagle. Occasional Papers of the Northern Territory Museum of Arts and Sciences 6(1): 69-84.

Sainsbury, K.J., Kailola, P.J. & Leyland, G.G. 1984. Continental Shelf Fishes of Northern and North-Western Australia. Canberra : Fisheries Information Service 375 pp. figs & pls.

Weber, M. 1911. Die Fische der Aru- und Kei-Inseln. Ein Beitrag zur Zoogeographie dieser Inseln. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 34: 1-49 figs 1-11 pls 1-2

Quick Facts

CAAB Code:37327016


Biology:Mouth brooder (males)

Depth:2-106 m

Habitat:Soft sediment areas

Max Size:11 cm TL

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Species Maps

CAAB distribution map