• Self-Cloning Marmorkreb Crayfish (Procambarus fallax cf. virginalis) - Tank-Raised!
  • Self-Cloning Marmorkreb Crayfish (Procambarus fallax cf. virginalis) - Tank-Raised!

Self-Cloning Marmorkreb Crayfish (Procambarus fallax cf. virginalis) - Tank-Raised!

$ 9.95

Choose a Variant:


The Self-Cloning Marmorkreb Crayfish (Procambarus fallax cf. virginalis, although this is a temporary species name at best) is an incredible anomaly of biology.  It is an all-female mutation that continually produces its own fertilized eggs, which develop into exact clones of the mother.  In fact, many of our specimens continually reproduce in our tanks at our facility!  This crayfish was reportedly discovered in a German pet shop, but little is known about its natural origins.  Many people believe it to be some sort of mutation of the true Marbled Crayfish (Procambarus fallax) or possibly a mutated hybrid of a Procambarus species and another unrelated crayfish.  

Though most crayfish are often reclusive by nature, this particular crayfish is very active by comparison and spends plenty of time exploring the floor of the aquarium in search of food.  The Self-Cloning Marmorkreb Crayfish is an omnivorous scavenger and will eat most any meaty or plant-based foods.  This crayfish should not be kept with ornamental live plants as it will eat them at a surprising rate.

As it reaches adulthood, the Self-Cloning Marmorkreb Crayfish may become relatively territorial, so it may behave aggressively towards other animals in the tank.  It is important that ample hiding places such as rockwork, driftwood, or PVC pipes be provided.  This is even more crucial when housing multiple crayfish in the same tank.  Due to the size and waste production of this crayfish, a minimum 30-gallon, well-filtered aquarium is necessary for one adult.  A larger aquarium can house multiple adults of similar size.  Extra space should be considered since Marmorkrebs will continually produce clones. 

This is a very hardy animal, but regular water changes are vital to its optimal health.  Other bottom-dwelling invertebrates and fish should not be kept with large crayfish.  It is possible to keep mid- and upper-level, fast-swimming fish with the Self-Cloning Marmorkreb Crayfish, but crayfish are opportunistic feeders and will generally eat whatever they can catch.  Many people report that Marmorkrebs are more peaceful (even with their own fry) and eat more vegetable matter than most crayfish, but each individual specimen may vary in personality.  

As with all of our crayfish, the coloration of the Self-Cloning Marmorkreb Crayfish is EXTREMELY high quality - much higher quality than others on the market!  This crayfish may TEMPORARILY change color and hide more than usual after molting, which may occur during shipping.  This is normal and the bright coloration will return in 2 weeks or less.

Due to its fast reproduction and nutritious qualities as a prey item, the Marmorkreb is an excellent crayfish to cultivate as a live food item for many predatory fish that are stubborn eaters.

Due to its constant production of clones, the Self-Cloning Marmorkreb species can grow to massive populations at a very fast rate.  No aquarium animals should ever be released into the wild, but it is particularly important to NEVER release this potentially invasive species into any local waterway.  It should never be kept in outdoor ponds or used as fishing bait.  This is a restricted/banned species in some US states, so you must check your state laws before purchasing.  Please be advised that this crayfish will produce a great deal of clones, many of which will reach adulthood and also begin reproducing at the same rate.


*IMPORTANT* Please "Choose a Variant" above before adding this crayfish to your cart. The variants we're currently offering are:

    • 1 Juvenile Marmorkreb Crayfish - 1+ inch (No sex specified.  Most popular option).
    • 1 B-Grade Marmorkreb Crayfish - 1+ inch Juvenile (All of our “B-Grade” crayfish are simply specimens that are missing legs or claws.  Loss of appendages is not permanent and happens commonly with crustaceans. They are completely healthy with excellent coloration and will completely regenerate lost appendages within 1 to 2 molts (about 2 to 3 months).


What We Like About This Crayfish:
  • Beautiful and variable coloration that makes for a wonderful centerpiece to the aquarium
  • Much more active than many crayfish species
  • Extremely hardy and adaptable
  • Excellent scavenger
  • Temperature: 65° - 76° F (18° - 24° C)
  • pH: 6.5 - 7.5
  • KH: 6 - 15 dKH
  • Minimum tank size: 30 gallons
  • Diet: Omnivorous. High-quality sinking pellets, plants, and freeze-dried or frozen meaty foods will be readily accepted. Cuttlebone should be added to the aquarium to supplement calcium, which will aid in exoskeleton production.
  • Warning! Avoid any food product, medication, or plant fertilizer that contains Copper of any form. Copper is toxic to invertebrates. Many commercial fish foods, medications, and plant fertilizers contain copper or more commonly copper sulfate. Always look at the ingredient list for any product going into the aquarium to ensure they are copper free.
  • Social behavior: Can be aggressive/territorial with its own kind. Crayfish will typically eat whatever they can catch, but since they are slow-moving, they are not often able to harm fast-moving fish.
  • Origin: Tank-raised, speculated to be a mutation of Southeastern United States species
  • Average adult size: 4 - 5 inches (10 - 12.7 cm)
  • Average purchase size: 1.5 + inch (4.8+ cm)
  • Recommended Aquatic Arts tankmates: Fast-moving fish (such as Celestial Pearl Danios, Rasboras, Guppies, etc.).  While dwarf shrimp can be kept successfully with these crayfish, caution should be exercised, as the crayfish have been known to catch and eat slow, sick, or particularly small shrimp.  Cichlids can be aggressive toward crayfish and should not be kept in the same tank.  Bottom-dwelling tankmates should definitely be avoided.
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