Flyspecked Hardyhead, Craterocephalus stercusmuscarum (Günther, 1867)
Freshwater Hardyhead, Freshwater Silverside, Line-eye, Mitchellian Hardyhead, Northern Fresh Water Hardyhead, Speckled Crat, Worrell's Freshwater Hardyhead
The related Unspecked Hardyhead, Craterocephalus fulvus, was originally described as a subspecies of C. stercusmuscarum. This species occurs in coastal drainages from southern Queensland to northern New South Wales and the Murray-Darling River system.
The Flyspecked Hardyhead has a slender body covered with black dots. The species is endemic to Australia. It occurs in some freshwater streams of the Northern Territory to southern Queensland.
The Flyspecked Hardyhead has a slender body covered with black dots. This pattern gave rise to the common name. The fish is golden yellow to deep green above, changing to white below. A dusky to silver stripe runs from the snout to the caudal peduncle.
The species is endemic to Australia. It occurs in some freshwater streams of the Northern Territory to southern Queensland.
The map below shows the Australian distribution of the species based on public sightings and specimens in Australian Museums. Source: Atlas of Living Australia.
Feeding and diet
The Flyspecked Hardyhead eats mainly mosquito larvae and aquatic insects. It will also eat crustaceans and has been observed eating algae in aquaria.
It can be easily kept in aquaria but its natural colours often fade.
- Allen, G.R. 1989. Freshwater Fishes of Australia. T.F.H. Publications. Pp. 240. Ivantsoff, W. & L.E.L.M. Crowley. in McDowall, R.M. 1996. Freshwater Fishes of South-Eastern Australia. Reed Books. Pp. 247.
- Hoese, D.F., Bray, D.J., Paxton, J.R. & G.R. Allen. 2006. Fishes. In Beesley, P.L. & A. Wells. (eds) Zoological Catalogue of Australia. Volume 35. ABRS & CSIRO Publishing: Australia. parts 1-3, pages 1-2178.
- Merrick, J.R. & G.E. Schmida. 1984. Australian Freshwater Fishes. Biology and Management. John R. Merrick. Pp. 409.