Overview
The Common Yabby (Cherax destructor) is a beginner freshwater species known for its brown-blue (also bright blue variant) coloration. Hardy. Bottom.
Origin & Appearance
Origin: Australia.
Colors: Brown-Blue (also bright Blue variant).
Body Shape: Crayfish/Lobster (elongate crustacean). Typical adult dimensions: 20.0 x 6.0 x 5.0.
Sexual Dimorphism: Moderate; males have larger claws, female wider tail.
Tank & Water Requirements
| Min Tank Size | 40 gallons |
| Temperature | 50–75°F |
| pH Range | 7–8 |
| Water Hardness (GH) | 8-20 |
| Bioload | medium |
| Oxygen Demand | medium |
| Plant Safe | mostly |
| Aquarium Position | Bottom |
Behavior & Activity
Vigorous bottom walker; constantly digs and burrows; rearranges entire substrate; powerful tail-flip escape
Speed: 22/100Aggression: 6/10diurnal
Breeding
Moderate; female carries eggs under tail
Common Diseases
💊 Crayfish plague💊 bacterial💊 molt failure
Expert Notes
Hardy; tolerates cold; destructive to plants