Description
Black Crayfish (Procambarus clarkii – Black Morph)
📌 Basic Info
Scientific Name: Procambarus clarkii (Black color morph)
Common Names: Black Crayfish, Dark Crayfish
Family: Cambaridae
Origin: Selectively bred morph (wild type native to Southern USA & Mexico)
Size: 4 – 6 inches (10 – 15 cm)
Lifespan: 3 – 5 years
Tank Zone: Bottom dweller
🌊 Water Parameters
TDS: 150 – 300 ppm
pH: 6.5 – 8.0
Temperature: 20 – 26°C (68 – 79°F)
Hardness: 6 – 15 dGH
🦞 Characteristics
Deep jet-black to dark brown exoskeleton, giving a bold, dramatic look.
Hardy, resilient, and adaptable to a wide range of conditions.
Territorial and aggressive toward other crayfish and bottom fish.
Nocturnal scavenger – more active at night.
Molts several times yearly; vulnerable during molting periods.
🍽️ Food
Type: Omnivorous scavenger.
Diet: Algae wafers, sinking pellets, vegetables (zucchini, peas, cucumber), protein foods (shrimp, snails, worms, frozen foods).
Feeding Schedule: Once daily; remove uneaten food.
🛠️ Tank Setup & Maintenance
Tank Size: Minimum 30 gallons for a single adult.
Filtration: Strong and efficient – they produce heavy bioload.
Decor: Provide caves, driftwood, PVC tubes, and rocks for hiding.
Substrate: Sand or fine gravel – they dig and burrow.
Water Changes: 25–30% weekly.
👥 Social Behavior
Highly territorial – best kept singly.
Can be housed with fast, upper-water fish (danios, barbs, tetras).
May attack slow fish, snails, or other invertebrates.
Not recommended with other crayfish unless in very large tanks with many hiding spots.
✅ Do’s
Provide secure hiding spaces for molting safety.
Keep the tank covered – they are escape artists.
Offer a balanced diet with plant and protein matter.
❌ Don’ts
Don’t keep with small or bottom-dwelling community fish.
Don’t keep with delicate plants – they dig and destroy them.
Don’t overcrowd with multiple crayfish.
⭐ Quick Tips
Striking jet-black coloration makes it a unique showpiece in aquariums.
Hardy and easy to care for, suitable for intermediate keepers.
Best displayed in a species-only tank or with carefully chosen fast tankmates.
