Fly-speckled Hardyhead
Craterocephalus stercusmuscarum
A peaceful Australian native that rewards patient keepers with lively schooling behavior.
About
The fly-speckled hardyhead (Craterocephalus stercusmuscarum) is a small, lively fish native to northern and eastern Australia and southern New Guinea, where it turns up in a surprisingly wide range of freshwater habitats. Rivers, quiet streams, lakes, ponds, reservoirs, and even warm springs. That adaptability across so many water body types hints at a resilient little fish, and it does earn a beginner-friendly reputation in the hobby. The common name comes from the scattered dark speckling along the body, which does genuinely resemble the marks left by flies. Not the most glamorous name, but honest. In terms of personality, this is a shy, nervy species that can bolt and panic when startled, so a calm, well-planted setup with consistent, unhurried tank mates suits it far better than a busy community with boisterous fish. Like most small schooling species, it does best in a proper group. A lone individual or a pair will spend most of its time hiding. Given enough companions and some cover to retreat to, a school of fly-speckled hardyheads becomes noticeably more confident and active. An omnivore by nature, it is not fussy about food, which makes day-to-day care refreshingly uncomplicated.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Fly-speckled Hardyhead
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Fly-speckled Hardyhead get?
- The Fly-speckled Hardyhead reaches about 1.5–4" as an adult.
- What size tank does the Fly-speckled Hardyhead need?
- A minimum of 35 gallons is recommended for the Fly-speckled Hardyhead, with more room needed for a proper group.
- What water parameters does the Fly-speckled Hardyhead need?
- The Fly-speckled Hardyhead does best with a temperature of 68–86°F, a pH of 6–7.5, hardness around 5–15 dGH.
- Is the Fly-speckled Hardyhead aggressive?
- The Fly-speckled Hardyhead is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Fly-speckled Hardyhead eat?
- The Fly-speckled Hardyhead is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Fly-speckled Hardyhead live?
- With good care, the Fly-speckled Hardyhead typically lives 3-5 years.