Hardyheads (genus Craterocephalus, family Atherinidae, plus the related New Guinea genus Sashatherina) are small, silvery, schooling fishes related to the rainbowfishes and blue-eyes, several of which make excellent aquarium companions for them. You can access species accounts below by clicking on the links in the list of species from Australia and New Guinea.
Australia
- Craterocephalus amniculus Crowley & Ivantsoff, 1990 — Darling Hardyhead
- Craterocephalus cuneiceps Whitley, 1944
- Craterocephalus dalhousiensis Ivantsoff & Glover, 1974 — Dalhousie Hardyhead
- Craterocephalus eyresii (Steindachner, 1883) — Lake Eyre Hardyhead
- Craterocephalus fluviatilis McCulloch, 1912 — Murray Hardyhead
- Craterocephalus helenae Ivantsoff, Crowley & Allen, 1987 — Drysdale Hardyhead
- Craterocephalus lentiginosus Ivantsoff, Crowley & Allen, 1987 — Freckled Hardyhead
- Craterocephalus marianae Ivantsoff, Crowley & Allen, 1987 — Mariana’s Hardyhead
- Craterocephalus marjoriae Whitley, 1948 — Marjorie’s Hardyhead
- Craterocephalus stercusmuscarum (Günther, 1867) — Flyspecked Hardyhead
- Craterocephalus stercusmuscarum fulvus Ivantsoff, Crowley & Allen, 1987 — Unspecked Hardyhead — some authors treat this as a full species, Craterocephalus fulvus
- Craterocephalus stramineus (Whitley, 1950) — Blackmast
New Guinea
Almost nothing has been recorded of these species in the broader literature beyond bare locality data and passing mentions — unsurprising given how remote and little-surveyed most of their ranges are. The undescribed Craterocephalus sp. Mbuta is a genetically distinct, as-yet-unnamed form from Lake Mbuta; Sashatherina giganteus is a related but separate genus with no biological information recorded in these sources at all.
- Craterocephalus fistularis Crowley, Ivantsoff & Allen, 1995
- Craterocephalus kailolae Ivantsoff, Crowley & Allen, 1987
- Craterocephalus lacustris Trewavas, 1940 — Lake Kutubu Hardyhead
- Craterocephalus nouhuysi (Weber, 1910) — Mountain Hardyhead
- Craterocephalus pimatuae Crowley, Ivantsoff & Allen, 1991 — Pima Hardyhead
- Craterocephalus randi Nichols & Raven, 1934 — Kubuna Hardyhead
- Craterocephalus sp. Mbuta undescribed — Mbuta Hardyhead
- Sashatherina giganteus Ivantsoff & Allen, 2011