Can Licorice Gourami and Mexican Dwarf Crayfish (CPO) Live Together?

Licorice Gourami is a peaceful species (2/10), while Mexican Dwarf Crayfish (CPO) is generally mild-mannered (4/10). This modest difference means Mexican Dwarf Crayfish (CPO) may occasionally assert dominance over Licorice Gourami.

Licorice Gourami and Mexican Dwarf Crayfish (CPO) both frequent the Bottom (Substrate) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion. Shrimp eaters may also prey on very small nano fish.

The safe temperature window for both species falls between 22°C and 25°C. Aim for the midpoint of this range (around 23.5°C) for optimal comfort.

The pH requirements of Licorice Gourami (3–6) and Mexican Dwarf Crayfish (CPO) (6.5–8) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Licorice Gourami needs 0–4 dGH while Mexican Dwarf Crayfish (CPO) requires 6–15 dGH.

To house Licorice Gourami and Mexican Dwarf Crayfish (CPO) together, plan for an aquarium of at least 19 litres with a minimum length of 30 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Leaf Litter/Blackwater, Plants - Densely covered, Plants - Floating, Driftwood (Digestion/Hiding), Sand (Sifters). Meeting these requirements will help both species thrive.

Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.

Licorice Gourami and Mexican Dwarf Crayfish (CPO) are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.

Feeding time deserves special attention with this pairing. Mexican Dwarf Crayfish (CPO) is a known shrimp eater and may prey on small invertebrates or nano fish like Licorice Gourami.