Seasonal Fish & Seafood

Visual Indicators of Freshness

Eyes

The eyes of a fresh fish are clear, bright, and slightly bulging. Cloudy, sunken, or bloodshot eyes indicate the fish is past its prime. For whole fish like madai (sea bream) or suzuki (sea bass), this is the most reliable sign. When buying fillets, you cannot see the eyes, so rely on other cues.

Gills

Lift the gill cover. Fresh gills are bright red or deep pink, moist, and free of slime. Brown, grey, or slimy gills signal deterioration. For example, a fresh buri (adult yellowtail) will have vivid red gills. In Hong Kong wet markets, vendors often allow inspection; do not hesitate to ask.

Skin and Scales

The skin should be shiny, taut, and covered with a thin, clear slime (the natural mucus layer). Dull, wrinkled skin or missing scales suggest age. For fish like saba (mackerel), the skin should have a metallic sheen. Scales should be firmly attached; if they fall off easily, the fish is not fresh.

Flesh Colour and Marbling

For fillets, colour varies by species. Maguro (tuna) should be deep red with even marbling (white fat lines). Sake (salmon) should be bright orange with white fat lines. Hirame (flounder) should be translucent white. Discoloration, browning, or a rainbow sheen (oxidation) are red flags. In Hong Kong, high-end supermarkets like City’super and Great Food Hall display fillets on ice; look for even colour and no dry edges.

Smell Test

Fresh fish smells like the ocean, clean, salty, and faintly sweet. It should not smell fishy, sour, or ammonia-like. The smell test is especially important for oily fish like saba or iwashi (sardine), which spoil faster. If you detect a strong “fishy” odour, it is likely past its peak. In Hong Kong’s open markets, you can often smell the fish from a few feet away; trust your nose.

Texture and Firmness

Whole Fish

Press the fish’s belly or side with a finger. Fresh fish flesh springs back quickly and leaves no indentation. If the dent remains, the fish is soft and less fresh. The belly should be firm, not mushy. For fish like tai (sea bream), the belly is often the first area to soften.

Fillets

For fillets, the flesh should be resilient to the touch. When you press it, it should feel dense and bounce back. In Hong Kong, some suppliers sell “sashimi-grade” fillets that have been frozen to kill parasites. These fillets should still feel firm, not slimy or mushy. Thawed fillets should have no excess liquid pooling in the package.

Sourcing and Storage

Where to Buy in Hong Kong

Reputable sources are critical. In Hong Kong, consider:

• City’super (multiple locations, e.g., Times Square, Harbour City), offers a wide range of Japanese-imported sashimi fish, including otoro, chu-toro, and amaebi (sweet shrimp). Prices range from HK$200, $800 per 100g for premium tuna.
• Great Food Hall (Pacific Place), stocks Norwegian salmon and local catch like garoupa.
• Tsukiji Fish Market (Hong Kong) (importers like Uo-ichi), supply many sushi restaurants; some have retail counters in places like Chateraise or Seafood Paradise.
• Ap Lei Chau Market (Aberdeen), for whole fish from local waters. Prices are lower (HK$50, $150 per catty) but require careful inspection.

Storage at Home

Once purchased, keep fish at 0-4°C. Place it on ice in the fridge, covered with a damp cloth to prevent drying. Use within 24 hours for best quality. If freezing, wrap tightly in plastic and use within one month. Note that freezing at -20°C for at least 24 hours kills parasites, a common practice for sashimi-grade fish. For more on handling, see our sashimi fish guide.

Specific Fish Types and Their Freshness Signs

Tuna (Maguro)

Look for deep red colour, even marbling, and a clean, metallic sheen. Avoid brownish patches or dry, stringy flesh. At City’super, otoro (fatty tuna) is priced around HK$600, $800 per 100g. Freshness is indicated by the fat melting point, it should feel buttery, not oily.

Salmon (Sake)

Bright orange with white fat lines. The flesh should be firm, not mushy. Avoid salmon with brown spots or a strong fishy smell. In Hong Kong, farmed salmon from Norway or Scotland is common. Wild salmon is available seasonally (summer) and has a deeper colour.

Yellowtail (Hamachi / Buri)

Flesh should be translucent pinkish-white with a stripe of darker meat. Fresh hamachi has a clean, mild flavour. The belly (toro) should be firm. In winter, buri (adult yellowtail) is prized for its higher fat content.

Sea Bream (Tai)

Whole fish should have clear eyes, red gills, and shiny skin. Flesh is white with a slight pinkish hue. Tai is often served as sashimi at celebrations. In Hong Kong, live tai is available at markets like Ap Lei Chau for around HK$120, $200 per fish.

Mackerel (Saba)

Fresh saba has iridescent blue-green skin and a firm body. It spoils quickly, so smell is crucial. It should smell briny, not fishy. Often cured with vinegar and salt before serving as sashimi. For more on preparation, see our sashimi cut guide.

Flounder (Hirame)

Flesh is translucent white, very firm. The skin should be smooth and slime-free. Hirame is often served as usuzukuri (thinly sliced). Freshness is indicated by a slight resistance when sliced.

What to Avoid at All Costs

• Strong fishy odour, indicates spoilage.
• Discoloured flesh, brown, grey, or greenish tones.
• Soft, mushy texture, bacterial breakdown.
• Excessive liquid in packaging, thawing damage or age.
• Cloudy eyes or brown gills (for whole fish).

If you are dining out, reputable omakase restaurants in Hong Kong source fish daily from trusted suppliers. At restaurants like Sushi Shikon (HK$2,000+ per person) or Ta-ke (HK$800+), the chef selects the fish. At home, always buy from a source you trust.

Tips for Home Preparation

If you plan to slice sashimi at home, follow these steps:

1. Confirm the fish is sashimi-grade, ask your supplier. In Hong Kong, many supermarkets label “sashimi-grade” on packages.
2. Keep the fish chilled at all times. Use a sharp knife (preferably a yanagiba) to make clean cuts. For guidance, see our sashimi cut guide.
3. Slice against the grain for tender pieces. For oily fish like salmon, slice at a slight angle.
4. Serve immediately on a chilled plate with soy sauce and wasabi. For accompaniments, see our sushi types guide.

For a deeper understanding of Japanese dining culture in Hong Kong, explore the complete guide to Japanese food in Hong Kong. It covers everything from izakaya to omakase.

Seasonality and Regional Differences

Fish freshness is also tied to season. In Hong Kong, winter (November, February) is prime for buri and kinki (channel rockfish). Summer (June, August) brings aji (horse mackerel) and sawara (Spanish mackerel). Local fish like garoupa and croaker are available year-round but peak in spring. Knowing the season helps you choose the freshest fish. Many Hong Kong fishmongers display the origin and catch date; ask if it is not visible.

For more on eating raw fish safely in Hong Kong, read our guide to ordering sushi. It includes tips on communicating with chefs about freshness preferences.

Conclusion

Identifying fresh fish for sashimi requires attention to sight, smell, and touch. In Hong Kong, where seafood is abundant, you can find excellent options at markets and supermarkets. Use the criteria in this guide, clear eyes, red gills, firm flesh, clean smell, to select the best fish. When in doubt, ask the vendor or chef. With practice, you will develop an instinct for freshness that ensures safe, delicious sashimi at home or in a restaurant.

For further reading, see our related articles below.