One crab, one cell
Individual housing eliminates fighting, cannibalism and limb loss — survival rates and product quality stay high.
Crab House
Vertical farming for crabs — a stackable single-crab box ("crab apartment") that isolates each mud crab in its own cell to prevent fighting and cannibalism, combined with a RAS water loop for clean, controlled, high-density soft-shell crab fattening indoors.
- BoxSingle-crab cell ~20×20×10 cm
- MaterialFood-grade PVC / ABS / PP
- LayoutVertical racks · 100s–1000s of cells
- WaterRAS loop · indoor, year-round
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
Crab House is an indoor factory stereo aquaculture using recycling water equipment designed for avoiding a conventional breeding pattern of low survival rate and higher risk, such as ordinary pound farming, sea aquaculture, and large indoor pool aquaculture.
Crab House consisted of many groups with ten floors and each floor has ten boxes, which is one hundred boxes totally for one group. Every group is equipped with a recycling water aquaculture system including a high-speed grit filter tank and UV Sanitiser.
Advantage:
- preventing from killing each other
- avoiding natural disaster
- saving area of pool and land
- protecting from natural enemy
- fastening growth with separately breeding
- controllable of the growth cycle
- providing good quality water
- preventing from diseases
- no pollution
Application
Package and Shipment
Specifications
Models & configuration
Indicative configurations integrated from the standard modular range — box size, cell count, rack height and the RAS package are scaled per project by SIGMA.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-CH-Box | |||
| SIGMA-CH-10 | |||
| SIGMA-CH-RAS-S | |||
| SIGMA-CH-RAS-L |
| Box material | Food-grade PVC / ABS / PP — individual cells with perforated flow-through door |
|---|---|
| Layout | Vertical multi-tier racks, linkable for expansion |
| Water loop | RAS recirculation: tier-by-tier flow + mechanical / biological filtration + aeration |
| Options | Filter, circulation pump, biofilter, temperature control (chiller), automatic water supply / drain |
| Species | Mud crab / soft-shell crab fattening, live crab holding |
| Working conditions | Indoor year-round intensive fattening and holding — independent of tides and weather |
System composition
Vertical high density
Multi-tier racks multiply output per square metre many times over versus open ponds.
Closed RAS loop
Tier-by-tier flow with filtration and aeration runs the farm indoors, year-round, independent of tides and weather.
Harvest at the moult
Each cell is inspected individually, so soft-shell crabs are collected at the exact moulting moment for premium prices.
Modular and scalable
Box size, cell count, rack height and RAS configuration scale from a pilot rack to a full commercial room.
Food-grade materials
Non-toxic PVC / ABS / PP, safe for food crabs.
Application
- Soft-shell crab fattening — the core application
- Individual grow-out of mud crab
- Live crab holding, fattening and pre-sale storage
- Indoor RAS crab farms in regions without sea access or tides
- Intermediate nursing of crablets
FAQ
Frequently asked questions
What is a crab house (crab apartment)?
It is a modular single-crab box system where each crab is housed in its own individual cell, which stops fighting, cannibalism and limb loss and lets every animal be fed, inspected and harvested separately.
How does vertical crab farming increase capacity?
The boxes stack into vertical racks, multiplying stocking capacity per square metre many times over versus open ponds.
How does the RAS crab system keep water clean?
The rack ties into a recirculating aquaculture system — water flows through every tier, passes mechanical and biological filtration, and returns clean and oxygenated, so the operation runs indoors year-round regardless of tides or weather.
What crabs is the crab house used for?
It is aimed at soft-shell crab fattening, mud crab grow-out and live crab holding, where individual housing plus RAS water quality drive survival and price premiums.
What are the boxes made of?
Boxes are molded from food-grade PVC / ABS / PP, each with a perforated door for flow-through and feeding access.
Related equipment
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View details →Request a tailored quote
Tell us your species, target density and site — our engineers size the system and reply within one business day.
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