• Marbled Crayfish (Procambarus fallax) - 2 to 3+ Inch Young Adult

Marbled Crayfish (Procambarus fallax) - 2 to 3+ Inch Young Adult

$ 9.95

Choose a Variant:


This fascinating crayfish is notable for its ability to change colors while maintaining its gorgeous marbled pattern!


This Marbled Crayfish (Procambarus fallax) is a lesser known, but very unique and colorful aquarium specimen.  This crayfish is also commonly known as the Marbled Freshwater Lobster, though true lobsters do not exist in freshwater.  The Marbled Crayfish can change colors frequently, ranging from brown to red to blue-green, all of which retain the beautiful marbled pattern. This species originates from the Southeastern United States but all of our specimens are tank-raised. Like most Procambarus species, the Marbled Crayfish reaches maturity very quickly and breeds easily in the aquarium.  In fact, many of our specimens have bred in our tanks at our facility!

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 Marbled 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 Marbled Crayfish will 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.  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 Marbled Crayfish, but crayfish are opportunistic feeders and will generally eat whatever they can catch.

As with all of our crayfish, the coloration of the Marbled 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. If your crayfish is not blue and you find a molt in the bag or in your aquarium, do not worry; this is normal and the bright color will return in 2 weeks or less.



*IMPORTANT* Please "Choose a Variant" above before adding this crayfish to your cart. The variants we're currently offering are:
    • 1 Marbled Crayfish (Procambarus fallax) - 2 to 3+ inch Young Adult (No sex specified / Most popular option)
    • 1 Female Marbled Crayfish (Procambarus fallax) - 2 to 3+ inches (We guarantee a very high-quality, breeding age young adult female crayfish for this listing).
    • 1 Male/Female Pair of Marbled Crayfish (Procambarus fallax) - 2 to 3+ inches (We guarantee a very high-quality, breeding age young adult male/female crayfish pair for this listing).
    • 1 B-Grade Marbled Crayfish (Procambarus fallax) 2 to 3+ inch Young Adult (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).
    • 1 Juvenile Marbled Crayfish (Procambarus fallax) - 1+ inch (A younger and smaller variant of Marbled Crayfish at a lower price than our young adult specimens. This is a particularly fast-growing, hardy species and will usually grow well into adult size and coloration within 1 to 3 months.  In the meantime, any customers who choose to go with a juvenile specimen can save some money and experience the excitement of watching their little crayfish grow!) 
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.
  • 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, but indigenous to Southeastern United States
  • Average Adult Size: 4 - 5 inches (10 - 12.7 cm) body length, minus claws
  • Average Purchase Size: 2 - 3  inches (5 - 7.6 cm)
  • Recommended Aquatic Arts tank mates: 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.
All Aquatic Arts brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!

Search our store