**Eucheuma cottonii sea moss is the red seaweed (also called Kappaphycus alvarezii, locally cottonii or katoni) that Indonesia grows more of than any country on earth. It is the primary source of kappa carrageenan, traded dried in grades priced by moisture and impurity — from commodity feedstock to cleaned food-grade material.**
Indonesia has farmed this species commercially since Philippine cottonii became cultivable here in 1974, and industry sources now describe the country as the world’s largest producer of red seaweeds. This guide covers what cottonii is, how it differs from gracilaria and Irish moss, which grades and moisture specs move the price, and how bales, containers and documents flow at wholesale volume. Every money page on this site branches from the questions below.
What exactly is Eucheuma cottonii sea moss?
Eucheuma cottonii is a warm-water red seaweed (division Rhodophyta), known scientifically as Kappaphycus alvarezii and by the local names cottonii, katoni, sacul and sakul. The “sea moss” label is a market term the Western health trade borrowed — botanically this is a tropical carrageenan seaweed, not the cold-water plant sold as Irish moss.
It is the primary source of kappa carrageenan, the gelling hydrocolloid used across dairy, meat and plant-based food. Its cousin Eucheuma spinosum yields iota carrageenan instead. The species grows naturally within roughly 20 degrees of latitude of the equator across the Indo-Pacific, concentrated in Southeast Asia, and in warm Indonesian waters it can reach about ten times its mass in 45 to 50 days. Farmers grow it by the longline method — plastic rope tied to lines anchored to poles on the seabed. If you need the species pinned to a verified [Eucheuma cottonii supplier](/eucheuma-cottonii-supplier/) or want [Kappaphycus alvarezii in bulk](/kappaphycus-alvarezii-bulk/), those pages carry current spec sheets. One honesty note: sea moss is a food and ingredient, not medicine — we make no disease-cure claims.
How is cottonii different from gracilaria and Irish moss?
Buyers conflate three seaweeds. Cottonii (Kappaphycus) gives kappa carrageenan with strong, firm gels. Gracilaria is processed mainly for agar, not carrageenan. Irish moss (Chondrus crispus) is a cold-water Atlantic species — same “sea moss” nickname, different chemistry, different waters.
For carrageenan processors and food formulators, that distinction is the whole purchase decision: cottonii is chosen for high gel strength and low impurity. Some Indonesian processors market cottonii specifically as the primary kappa-carrageenan source with high gel strength and low impurity. If your specification is kappa gel behaviour, start with our [kappa carrageenan seaweed](/kappa-carrageenan-seaweed/) and [raw carrageenan-grade cottonii](/eucheuma-cottonii-carrageenan-raw/) pages, or the broader [Indonesia red seaweed wholesale](/indonesia-red-seaweed-wholesale/) overview.
Which grades and specs matter — and what do they cost?
Documented wholesale specs for dried Eucheuma cottonii vary by trader, so treat any exact figure as claimable only when it appears on a specific batch Certificate of Analysis (COA). The table below maps the grades most Indonesian exporters actually quote against our canonical price band.
| Grade | Moisture | Impurity / foreign matter | Typical use | FOB band (per 2026) |
|---|---|---|---|---|
| Commodity / salted | 37–39% | max ~2–5% | Bulk carrageenan feedstock | USD 4–7/kg |
| Standard sun-dried | 35–37% max | 3% max | General export, most buyers | USD 6–9/kg |
| Grade A dried raw | under 35% | under 2% | Low-moisture premium selection | USD 9–12/kg |
| Cleaned / washed food-grade | per COA | per COA | Nutraceutical, private-label health | USD 25–55/kg |
These are FOB indicative figures per 2026 and move with harvest, moisture and grade — a final quote follows your spec and MOQ. Branded Western retail sea moss sells far higher, but that is a shelf price, not our export quote. Detail lives on the [Grade A dried raw algae](/dried-raw-algae-grade-a/), [food-grade cottonii](/eucheuma-cottonii-food-grade/), [moisture-graded cottonii](/eucheuma-cottonii-moisture-grade/) and [impurity-spec](/eucheuma-cottonii-impurity-spec/) pages.
How do moisture and drying decide your yield?
Moisture quietly sets your real cost. Salted, higher-moisture material is cheaper per kg but you pay to ship water; low-moisture Grade A costs more per kg but travels denser and stores better. Sun-drying is standard, and seasonality bites — monsoon and rainy months lengthen drying time and push moisture up, so the same farm’s cottonii can miss a 37% ceiling in the wet season.
Two crop risks also affect what lands in the bale: ice-ice disease and epiphytes, both of which degrade quality if harvest timing slips. Properly dried cottonii — stored cool, dry, sealed and out of direct sunlight — holds a shelf life of about 12 months. Buyers comparing lots should read our [dried Eucheuma cottonii export](/dried-eucheuma-cottonii-export/) and [Indonesia Eucheuma cottonii wholesale](/indonesia-eucheuma-cottonii-wholesale/) guides before locking a moisture clause.
Where in Indonesia does the best cottonii come from?
Production spreads across the eastern archipelago, with South Sulawesi as the volume heartland. Bali functions as a sourcing and logistics hub, not a documented large production zone — so treat any “Bali-grown” tonnage claim with caution.
| Region | Role in the chain | Notes for buyers |
|---|---|---|
| South Sulawesi (Bone, Maros, Jeneponto, Takalar, Luwu, East Luwu) | Major production heartland | Deepest volume, established farmer groups |
| NTT & West Nusa Tenggara (NTB), West Lombok | Large production zones | Strong dry-season drying windows |
| Maluku, North Kalimantan | Additional production | Growing supply, variable logistics |
| Surabaya / East Java | Processing & export gateway | Domestic carrageenan processors run food-grade output around Surabaya and East Java |
| Bali | Sourcing & logistics hub | Consolidation and export coordination, not a big farm belt |
For origin-specific supply, see [Sulawesi Eucheuma cottonii producer](/sulawesi-eucheuma-cottonii-producer/), [NTT cottonii supply](/ntt-eucheuma-cottonii-supply/) and [Bali Eucheuma cottonii seaweed](/bali-eucheuma-cottonii-seaweed/). For market context, Indonesia has a real, expanding domestic carrageenan-processing base around Surabaya and East Java, with large processors handling cottonii, spinosum and Gracilaria.
How do MOQ, bales and containers work?
Most first orders begin at a 1 MT trial and rise to 20–100 MT contracts, since a container runs roughly 20–25 MT. Product is baled and wrapped in polypropylene cloth in 50 kg or 100 kg bags. Loading capacity: a 20ft holds about 15 MT, a 40ft about 23 MT, and a 40HC about 25 MT — roughly 350 × 100 kg bales per 40HC.
Trade terms offered are FOB, CIF or CNF, with delivery commonly 30–60 days after payment is approved, by T/T, 100% irrevocable LC at sight, or advance. Standard export documents include the COA, MSDS, fumigation certificate, phytosanitary certificate and Certificate of Origin; Halal and HACCP/ISO 22000 are supplied on request. Dig into [container loading](/eucheuma-cottonii-container-load/), [bale supply](/indonesian-seaweed-bale-supplier/), [FOB export](/indonesia-seaweed-fob-export/), [CIF pricing](/eucheuma-cottonii-cif-price/), [COA specs](/seaweed-certificate-of-analysis/), [halal export](/indonesia-seaweed-halal-export/), [fumigation](/seaweed-fumigation-service/), [phytosanitary shipment](/seaweed-phytosanitary-shipment/), our [export consultant desk](/seaweed-export-consultant/), or [drying-facility investment](/seaweed-drying-facility-investment/).
How sourcing works with our desk
- Send your spec — grade, target moisture, impurity ceiling, MOQ and destination port.
- Get an indicative FOB/CIF band — matched to the price table above, date-stamped and honest.
- Sample and COA — review a batch COA for moisture, ash, foreign matter, microbiology, heavy metals and carrageenan yield before you commit.
- Contract and shipment — confirm terms, documents and container plan; we don’t guarantee customs clearance, and figures stay subject to harvest.
Talk to a real sourcing desk
Sourcing is handled by Bali Premium Trip, an independent concierge and export desk — not the farm owner and not a licensed adviser. We arrange supply via vetted partners and route your COA-backed quote fast. Message WhatsApp +62 811-2859-0000 or email sales@balipremiumtrip.com with your grade, MOQ and port. Working SLA: 24 working hours.
Frequently Asked Questions
Is Eucheuma cottonii technically a sea moss or just a red seaweed?
Botanically it is a tropical red seaweed, Kappaphycus alvarezii, not the cold-water plant historically called sea moss. “Sea moss” is a market name the Western wellness trade applies broadly to gel-forming red algae. Cottonii qualifies commercially as sea moss, but its native identity is a warm-water carrageenan seaweed grown across Indonesia and the Indo-Pacific.
What is the difference between Eucheuma cottonii and Chondrus crispus sea moss?
Chondrus crispus is Irish moss, a cold-water Atlantic species; Eucheuma cottonii (Kappaphycus alvarezii) is a warm-water Indo-Pacific species. Cottonii is the dominant commercial source of kappa carrageenan with firm gel strength, while Chondrus grows in temperate northern waters. They share the “sea moss” nickname but differ in origin, chemistry and gelling behaviour.
Why do carrageenan factories prefer Eucheuma cottonii over other seaweeds?
Because cottonii is the primary source of kappa carrageenan, which delivers strong, firm gels that gracilaria (an agar seaweed) and many alternatives cannot match. Processors value its high gel strength and low impurity, plus reliable Indonesian volume. That combination of yield, gel performance and supply scale is why kappa-focused factories build around cottonii feedstock.
How long does it take to grow Eucheuma cottonii from planting to harvest in Indonesia?
In warm tropical Indonesian waters the species can reach about ten times its mass in roughly 45 to 50 days, which frames a typical grow-out cycle. Farmers use the longline method with plastic rope anchored to seabed poles. Actual harvest timing shifts with season, water temperature and crop-health risks like ice-ice disease and epiphytes.
How does a moisture specification like 35–37 percent affect pricing and acceptance?
Moisture sets both price and pass/fail at delivery. Higher-moisture salted lots are cheaper per kg but heavier to ship and quicker to spoil; low-moisture Grade A (under 35%) costs more but stores and travels better. Any moisture figure is only reliable when it comes from a specific batch COA — confirm it before you accept a shipment.