HDPE rides the waves
UV-stabilised HDPE collars are corrosion-free and flexible enough to absorb wave energy, rated for a long service life in fresh and salt water.
Float Cage
Farm fish in open water with HDPE floating fish cages — UV-stable HDPE pipe collars with railing, mooring and a graded net pen, in round or square modules, built to ride waves in lakes, reservoirs, rivers and inshore sea for tilapia, snapper, grouper and more.
- FrameUV-stable HDPE · 2–3 rings
- RoundØ 6 / 8 / 10 / 12 m
- Square3×3 – 5×5 m modules
- Mesh~8–40 mm graded net
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
Fish Cage is made from HDPE tubular product and cage fitting, using foreign imported special-cage purpose polyethylene raw material. This kind of tubular product has good strength and tenacity. Using a unique structure design by our company, the frame will have the ability to resist stormy waves, meanwhile, all frame materials go through the ultraviolet rays aging resist and seawater corrosive resist process, and the service life is over 15 years.
According to customer demand, the circumference is from 30m to 160m, and the net depth is from 5m to 30m. Effective farming up to 30,000 m3.
Advantage:
- Framework: Polyethelene Tube with reliable strength, elasticity, and ductility.
- Fixed System: Timber Pile, Anchor Pile, Cement Concrete Pile, according to the geology condition of the cage location.
- Netting: use PE/ Polyester/ Nylon knotless nets, which have strong adhesion resistance and aging resistance.
Video of Product
Application
Package and Shipment
Specifications
Models & configuration
Dimensions and mesh sizes are the standard configurable range — final cage specification is confirmed by SIGMA per project.
| Floating collar | UV-stabilised HDPE pipe, double or triple ring — corrosion-free and wave-flexible |
|---|---|
| Shapes | Round (open-water, wave-riding) / square (modular pontoon walkways for sheltered water) |
| Round sizes | Ø 6 / 8 / 10 / 12 m common (circumference customisable) |
| Square modules | 3×3 / 4×4 / 5×5 m units, joined into arrays |
| Net pen | Knotless nylon / HDPE netting; predator and bird net optional |
| Mesh size | Fingerling ~8–15 mm · grow-out 20–40 mm |
| Package | Floating collar + handrail/stanchions + mooring/anchor set + net — complete, site-assembled |
| Waters & species | Lakes / reservoirs / rivers / inshore sea — tilapia, snapper, grouper, sea bass and similar |
System composition
Round or square to suit the water
Round collars for open, wave-exposed water; square pontoon-walkway modules for sheltered lakes and rivers.
Complete package, site-assembled
Collar, handrail, mooring/anchor set and net ship together, ready to assemble on site.
Graded net pens
Mesh sized to the fish — fine for fingerlings, larger for grow-out — with predator and bird net options.
Modular expansion
Scale from small grow-out modules to large commercial arrays by joining units.
Multi-species, fresh and salt
Suits tilapia, snapper, grouper, sea bass and similar species across freshwater and marine sites.
Application
- Lake and reservoir cage culture — tilapia as the lead species
- Flowing-water cages in rivers
- Inshore and estuary marine cages for grouper, snapper and sea bass
- Fingerling holding and grading cages
- Cage feeding paired with automatic fish feeders
Video
Float Cage
FAQ
Frequently asked questions
What is a floating fish cage used for?
Cage culture lets a farm raise fish in lakes, reservoirs, rivers and inshore sea without building tanks. SIGMA’s floating cages combine buoyant HDPE collars, a walkway railing, a mooring system and a graded net pen.
Should I choose a round or square floating cage?
Round collars are the classic open-water form built to ride waves, while square modular pontoon-walkway cages suit sheltered water; both scale from small grow-out modules to large commercial arrays.
What net mesh size is used?
The net pen hangs inside with mesh sized to the fish — fine (~8–15 mm) for fingerlings and larger (20–40 mm) for grow-out — typically knotless nylon or HDPE netting with a predator and bird net option.
What species can be farmed in floating cages?
It suits tilapia, snapper, grouper, sea bass and similar across freshwater and inshore marine operations.
What is in a complete cage package?
The floating collar, handrail / stanchions, mooring / anchor set and net, ready to assemble on site.
Related equipment
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Automatic & smart fish-feeding machines for ponds, cages & RAS — programmable timing, even broadcast, saves labor & feed. Multiple capacities from SIGMA. Get a quote.
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Fish Shrimp Feed
High-protein floating & sinking feed for tilapia, shrimp & carp — optimized FCR, stable in water, full size range. Bulk aquafeed supply from SIGMA. Request details & a quote.
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HDPE Fish Tank
Durable HDPE fish-farming tanks — on-site welding, 15-year liner, lower cost than earthen ponds. Any diameter & depth. SIGMA ships worldwide. Get sizes & a quote in 12h.
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.
Float Cage Request a Quote