Product Parameters

A Frozen Bonito

Product Details

A Frozen Bonito

A practical, budget‑conscious grade for high‑volume applications. These fish show natural size variation, occasional scale loss, or minor surface marks – none of which compromise the firm, dark red flesh or the bold, savory oceanic flavor that bonito is known for. Ideal for grilling, smoking, canning, or processing into katsuobushi (dried bonito flakes). Frozen promptly after harvest to lock in basic freshness, myoglobin content, and texture. Sold whole round (head, tail, viscera intact; gutting available on request). Packed in economical bulk cartons or poly bags. A straightforward, no‑frills choice for canneries, fishmeal production, large‑scale catering, or any operation where solid flavor and cost efficiency matter more than perfect appearance.

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FAQ

01.What are the acceptable quality limits for A grade frozen bonito in terms of visual defects and odor?

A grade is the lowest commercial tier for human consumption. Acceptable limits include: scale loss up to 15‑20% of body surface; eyes may be moderately sunken or slightly cloudy in up to 15% of sampled fish; gills may be brownish to grey (but not black or slimy); belly may be soft but not mushy; and a mild fishy odor is permitted, but no ammonia or strong sour smell. These defects do not compromise food safety when the fish is properly cooked or processed. For canning, surimi, or deep‑frying, these visual imperfections are completely masked by processing. Any ammonia odor, mushy texture, or black slimy gills in more than 5‑10% of sampled fish justifies outright rejection, even for A grade.

02.What histamine limits must A grade frozen bonito meet for export to the EU and US, and why is this critical for food safety?

Bonito is a histamine‑forming (scombrotoxin) species. For the EU, Regulation (EC) No 2073/2005 sets a nine‑sample testing plan with an average limit of 100 mg/kg and a maximum single value of 200 mg/kg. For the US, the FDA enforces an action level of 50 ppm (mg/kg). Histamine is heat‑stable – once formed, it cannot be destroyed by cooking, canning, or freezing. Even for A grade, which may have had a longer pre‑freezing holding time, strict cold chain must be maintained: rapid chilling to ≤4°C within 6‑8 hours of capture, and continuous frozen storage at -18°C or below. Buyers should require batch‑specific histamine test reports from an ISO 17025‑accredited lab. Any lot exceeding the regulatory limits must be rejected, as histamine can cause severe health issues for sensitive consumers.

03.What are the most suitable processing applications for A grade frozen bonito, and what defects are acceptable for each use?

A grade frozen bonito is widely used in cost‑sensitive industrial applications where visual appearance is not critical:

Canning – Scale loss, moderate belly softening, and brownish gills are acceptable because the fish is cooked in oil, brine, or sauce, and the final product appears as chunks or flakes. Defects that are not acceptable: ammonia odor, mushy texture, or black slimy gills.

Surimi / fish ball production – Grinding eliminates all surface defects. Only strong off‑odors (ammonia) or complete belly disintegration would cause rejection.

Deep‑frying / pan‑frying – Coating with flour or batter masks scale loss, minor bruising, and discoloration. The fish must be free from ammonia odor and should not disintegrate during cooking.

Fishmeal / pet food – Any A grade bonito that fails the above sensory checks (e.g., moderate ammonia odor, excessive belly softening) can still be diverted to fishmeal or pet food, as heat processing and grinding will render it safe and usable.