What tank size does a Dwarf Orange Crayfish need?

A Dwarf Orange Crayfish needs an aquarium of at least 40 litres (10.6 US gallons) with a footprint at least 40 cm (15.7 in) long — for this species, swimming length matters as much as raw volume.

What water parameters does a Dwarf Orange Crayfish need?

Dwarf Orange Crayfish does best at 16–28 °C (60.8–82.4 °F), pH 6.5–8.5 and a general hardness of 6–20 °dGH.

Is the Dwarf Orange Crayfish suitable for beginners?

Yes — Dwarf Orange Crayfish is one of the easier species to keep and forgives typical first-tank mistakes, as long as the aquarium is cycled and maintained.

Species library

Dwarf Orange Crayfish

Cambarellus patzcuarensis

Cambaridae

InvertsDifficulty: ●●○○○Data: well-established

📷 Veitw · CC BY-SA 3.0 · resized · Wikimedia Commons

Dwarf Orange Crayfish — Cambarellus patzcuarensis — 📷 Veitw · CC BY-SA 3.0 · resized · Wikimedia Commons

About

The dwarf orange crayfish, known in the hobby as the CPO, is a miniature Mexican crayfish selectively bred to a vivid orange from Cambarellus patzcuarensis, a species endemic to Lake Patzcuaro in Michoacan. Reaching only about 4 to 5 cm, it is far more peaceful than its full-size cousins: it grazes the tank floor for detritus, leaves healthy plants alone, and generally coexists with adult shrimp, though it may seize a weak or freshly molted one given the chance. It is bold, characterful and easy to keep in a mature nano aquarium.

Care

Give each crayfish its own cave or tube in a stable, well-oxygenated tank with harder water and enough calcium for clean molts. Keep singly or in small groups with abundant cover, and watch smaller tankmates around molting time.

Diet

Omnivorous scavenger that forages on detritus, biofilm, soft algae and leftover food; round out the diet with sinking invertebrate pellets, blanched vegetables and occasional protein, easing off feeding while it molts.

Tankmate compatibility

Gets along with (45)

Possible with care (181)

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Avoid (45)

Computed by the AquaSage engine for a spacious reference tank — always check the full verdict for your exact setup in the calculator.

Telling males from females

There is no reliable way to sex this species by eye. That is the honest answer, not a gap in our data.

All the methods, with diagrams

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Frequently asked questions

What tank size does a Dwarf Orange Crayfish need?: A Dwarf Orange Crayfish needs an aquarium of at least 40 litres (10.6 US gallons) with a footprint at least 40 cm (15.7 in) long — for this species, swimming length matters as much as raw volume.
What water parameters does a Dwarf Orange Crayfish need?: Dwarf Orange Crayfish does best at 16–28 °C (60.8–82.4 °F), pH 6.5–8.5 and a general hardness of 6–20 °dGH.
Is the Dwarf Orange Crayfish suitable for beginners?: Yes — Dwarf Orange Crayfish is one of the easier species to keep and forgives typical first-tank mistakes, as long as the aquarium is cycled and maintained.

Sources

Water & tank

Temperature16–28°C

Optimal temp.20–25°C

pH6.5–8.5

Hardness (GH)6–20°d

Carbonate (KH)3–15°d

Adult size5 cm

Min. volume≥ 40 L

Min. tank length≥ 40 cm

Swimming zoneBottom

TemperamentPeaceful

Water typeFreshwater

FlowLow

Lifespan~2 yrs

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