Sea Cucumber Viscera: The Underutilized Byproduct with Commercial Potential

In the global sea cucumber processing industry, standard practice discards the most voluminous part of the animal. The internal organs — intestines, gonads, respiratory trees, and associated tissues collectively referred to as viscera — are removed during evisceration and, in the vast majority of operations, treated as waste. The scientific literature has now accumulated sufficient evidence to challenge this practice on both commercial and sustainability grounds.

The Scale of What Is Currently Being Discarded

In most forms of trade, only the body wall and muscle bands of sea cucumbers are harvested and sold, while the intestines, gonads, and other organs — termed viscera — which can account for up to 50% of the sea cucumber's total weight, are considered unwanted products and are often discarded. The discarding of sea cucumber viscera results in resource waste and environmental contamination, since they may contain heavy metals such as arsenic, cadmium, lead, and mercury, which are well-known to be toxic to the environment and human health when exceeding standard limits.

This figure — up to 50% of total biomass discarded as waste — is documented in a 2023 review published in PeerJ by researchers from Universiti Malaysia Terengganu, Hasanuddin University Makassar, Shantou University, and Universiti Sains Malaysia. The Indonesian institutional co-authorship is significant: this is not theoretical research conducted in isolation from the Indonesian industry — it reflects active scientific engagement with the Indonesian sea cucumber processing sector's waste problem.

The environmental liability of discarded viscera is increasingly relevant as Indonesian export facilities face greater scrutiny from international certification bodies and buyers with ESG-linked procurement requirements.

What Sea Cucumber Viscera Actually Contains

The assumption that viscera are low-value waste is contradicted by their documented nutritional and bioactive composition.

• Omega-3 Polyunsaturated Fatty Acids

  Research published in Processes (MDPI, 2021) on sea cucumber viscera documented that both air- and freeze-dried viscera had total fatty acid composition similar to fresh viscera, with high levels of omega-3 polyunsaturated fatty acids at 30–31%, especially eicosapentaenoic acid (EPA) at 27–28%, and low levels of omega-6 PUFAs at approximately 1%. The dried samples were abundant in essential amino acids at 46–51%.

  The EPA concentration — among the highest documented in any marine byproduct fraction — positions dried sea cucumber viscera as a candidate raw material for omega-3 supplement manufacturers seeking marine alternatives to fish oil. Research published in Marine Drugs (MDPI, 2024) on supercritical CO₂ extraction of omega-3 fatty acids from sea cucumber viscera confirmed that EPA, palmitoleic acid, and 12-methyltetradecanoic acid were the major fatty acids, with EPA proportions reaching 22.49% in total fatty acids using ultrasonic-assisted extraction methods.

• Bioactive Peptides, Polysaccharides, and Saponins

  Sea cucumber viscera have been reported to contain various nutrients such as oligosaccharides, saponins, phenols, flavonoids, lipids, proteins, fatty acids, and amino acids. They also contain high levels of omega-3 PUFAs and glycine, making them suitable for processing into functional foods and dietary supplements.

  Research published in Marine Drugs (MDPI, 2022) confirmed that sea cucumber processing byproducts yield bioactive peptides with antioxidant and ACE inhibitory activity — findings generated through bioinformatic analysis of underutilized byproduct fractions, establishing a scientific basis for viscera-derived peptide extraction as a viable commercial process.

• Gut Microbiota and Metabolic Health Applications

  A 2026 review published in Biology (MDPI) documented the mechanisms through which sea cucumber viscera bioactives interact with the gut microbiome. Sea cucumber viscera are a valuable source of health-promoting compounds, with substances from the viscera shown to support beneficial gut bacteria. Increasing these beneficial bacteria helps the body better regulate blood sugar and cholesterol, boosts immunity, reduces inflammation, slows aging-related damage, and lowers high uric acid levels.

  These documented mechanisms — operating through specific gut microbiota modulation pathways — provide a substantiated biological rationale for viscera-derived ingredients in functional food and nutraceutical formulations targeting metabolic health categories.

Applications Across Industry Sectors

Discarded sea cucumber viscera contain various nutrients that can be used in many applications, including as functional feed additives in the aquaculture industry, sources of natural testosterone for application in sex reversal and production of monosex populations, neuroprotective agents against central nervous system disorders, and cosmetic ingredients, especially for skin whitening and anti-ageing products.

For organizations evaluating the full value potential of sea cucumber raw material, this range of documented applications — spanning aquaculture feed to cosmeceuticals to neurological health — reflects the breadth of commercial opportunity that currently sits in the waste stream of conventional processing operations.

• Aquaculture Feed

  Sea cucumber viscera are a high-value source of nutrients and bioactive compounds that can be used as functional feed additives in the aquaculture industry, according to the PeerJ (2023) review. For Indonesian processing operations, proximity to shrimp and fish aquaculture creates a potential local market for viscera-derived feed ingredients without long-distance logistics — a circular economy application that reduces both waste disposal costs and raw material acquisition costs for aquaculture operations simultaneously.

• Cosmetics and Skin Care

  Research on the skin-care efficacy of viscera enzymatic hydrolysates from Apostichopus japonicus — cited in the 2026 Biology review — confirmed meaningful skin-care activity from viscera-derived fractions. For cosmetics manufacturers already evaluating sea cucumber body wall collagen as a raw material, viscera hydrolysates represent an additional, lower-cost fraction from the same supply chain that delivers documented skin-care bioactivity.

• Omega-3 Supplement Manufacturing

  The EPA concentration documented in sea cucumber viscera — consistently reported in the range of 20–28% of total fatty acids across multiple peer-reviewed studies — places this byproduct fraction in direct comparison with fish oil as a marine omega-3 source. For supplement manufacturers seeking supply chain diversification away from conventional fish oil, or seeking marine omega-3 sources with a distinct fatty acid profile, sea cucumber viscera represent a scientifically substantiated alternative input.

The Environmental and Regulatory Dimension

Sea cucumber viscera, the primary byproduct of processing, are generated in increasing quantities annually, leading to significant environmental pollution and resource wastage. Processing facilities that discharge untreated viscera into coastal marine environments contribute to localized nutrient loading and heavy metal contamination — both of which are subject to increasing regulatory attention in Indonesian coastal management policy.

For processing operations seeking export certification to premium markets — including pharmaceutical-grade buyers and sustainability-certified food manufacturers — documented viscera management protocols are likely to become a baseline compliance requirement rather than a differentiator in the near term.

Extraction Technologies: From Research to Commercial Scale

Multiple extraction and processing pathways have been validated at research scale specifically for sea cucumber viscera. Air drying and freeze drying have been confirmed to preserve the omega-3 fatty acid and essential amino acid profile of fresh viscera without significant degradation. Enzymatic hydrolysis — using commercially available proteases — produces bioactive peptide fractions with antioxidant and ACE inhibitory activity from viscera protein. Supercritical carbon dioxide extraction has been validated as a green, solvent-free method for omega-3 lipid concentration from dried viscera.

The constraint on viscera valorization is not scientific feasibility — the research base is sufficient. It is the absence of commercial processing infrastructure at scale, and the established industry norm of treating viscera as waste rather than as a secondary raw material stream.

The Commercial Case for Viscera Valorization

The business case for viscera valorization rests on three converging factors. First, the raw material is available at zero acquisition cost — it is already being removed from the animal as a necessary processing step. Second, the scientific literature has established that this material contains commercially meaningful concentrations of compounds with verified market demand: EPA-rich omega-3 fractions, bioactive peptides, saponins, and gut microbiota-active polysaccharides. Third, multiple extraction pathways have been validated at research scale.

For Indonesian sea cucumber processors currently discarding up to 50% of their raw material biomass, viscera valorization represents a potential second revenue stream from the same harvested animal — with no incremental harvesting cost and a documented scientific foundation for downstream product development.

Sepanjang is available to discuss the sourcing and specification requirements of organizations evaluating sea cucumber viscera as a raw material input for nutraceutical, pharmaceutical, aquaculture feed, or cosmetics applications. Contact our team to begin a specification discussion.

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Sepanjang — Indonesia's Specialty Ocean Products Co. Sourcing high-quality sea cucumber directly from Indonesian waters for over 20 years.