How to Clean and Fillet Yellowtail Caught in San Diego

Landing a yellowtail at Point Loma is one of the highlights of San Diego spearfishing — but your work doesn’t end when the fish hits the float. How you handle the fish from the moment of the shot through the filleting table determines whether you’re eating extraordinary sashimi or mediocre fish tacos. Cleaning and filleting yellowtail caught in San Diego is a skill set every spearo should master.

Step 1: In-Water Handling After the Shot

A clean kill is the first step in quality fish care. A stone shot through the brain (directly behind the eye) kills the fish instantly and prevents lactic acid buildup from a long fight. If the fish requires a second shot or a significant struggle, it will be measurably lower quality eating.

Immediately after landing:

• Spike the brain with a dive knife if not already killed by the shot
• Cut both gill arches with a knife to initiate bleeding
• Place the fish head-down into your float’s fish bag or a mesh bag suspended in the water
• If you have ice in your boat cooler, get the fish on ice as quickly as possible — within 15 minutes is ideal

Never leave a dead fish in a warm gear bag or bouncing on a stringer in direct sun. Heat degrades muscle tissue within minutes.

Step 2: Ike Jime for Sashimi-Grade Quality (Optional but Recommended)

Ike jime is a Japanese fish-killing technique that produces the highest quality flesh by minimising stress and lactic acid. For San Diego yellowtail destined for sashimi:

1. Drive a spike or sharp knife point through the skull at the lateral line junction — this destroys the brain instantly
2. Insert a stiff wire (ike jime wire) into the spinal canal from the brain cavity and thread it toward the tail, destroying the spinal cord
3. Cut the gills and the base of the tail and suspend the fish head-down to bleed
4. Place in ice slurry (saltwater ice mix)

Fish processed with ike jime experience rigor mortis later and more uniformly, resulting in firmer, cleaner-tasting flesh that holds up better for sashimi. Many San Diego spearos who target yellowtail specifically for raw consumption use this technique routinely.

Step 3: Scaling and Rinsing

Yellowtail have fine scales that are relatively easy to remove. Use a fish scaler or the back of a knife, working from tail to head. Rinse the fish thoroughly with cold salt water.

For fish being prepared as sashimi or Japanese-style dishes, scaling is essential. For grilled or baked preparations, leaving the skin on (scaled) is fine.

Step 4: Filleting the Yellowtail

A yellowtail of 15–25 lbs — typical for a Point Loma catch — requires a longer fillet knife and confident cuts to extract clean fillets. Here’s the standard procedure:

Tools needed:

• Flexible fillet knife (10–12 inch blade)
• Cutting board (large enough for the whole fish)
• Bowl of ice water

Fillet process:

1. Head cut: Angle the knife behind the pectoral fin and cut down to the spine. Do not cut through the spine.

2. Backbone run: Position the blade along the top of the spine and run it from head to tail in long, smooth strokes, letting the blade follow the bone. Keep the blade flat against the ribs to maximise yield.

3. Rib cage removal: After freeing the fillet from the spine, angle the knife under the rib cage and cut the ribs free from the flesh. On a large yellowtail, the belly meat below the ribs is a prized cut — don’t discard it.

4. Lateral line removal: The lateral line in yellowtail contains a band of darker, stronger-flavoured “blood meat.” For sashimi, remove this by cutting a V-shaped channel along the lateral line. For cooked preparations, you can leave it.

5. Pin bones: Run your finger from head to tail along the centreline of the fillet to locate the row of pin bones. Remove them with needle-nose pliers or fish tweezers.

6. Repeat for the second side: Flip the fish and repeat the process.

Step 5: Portioning for Different Preparations

San Diego yellowtail is exceptionally versatile. From a single large fish you can produce:

• Sashimi cuts: Slice the centre loin against the grain at 6–8mm thickness
• Collar (kama): The pectoral fin collar is a prized cut. Salt, rest 30 minutes, and grill over high heat
• Belly strips: Rich, fatty belly meat ideal for sashimi or tataki
• Tail section: Slightly firmer — excellent for ceviche or grilling
• Trim and scraps: Yellowtail collar soup or fish cake

Step 6: Storage

• Wrap fillets in paper towels and then plastic wrap, refrigerate on ice, use within 48 hours for raw applications
• Vacuum seal and freeze for long-term storage (6 months at 0°F)
• For sashimi, unwrap and rest on a clean rack in the fridge for 1 hour before cutting to allow surface moisture to evaporate — this improves texture

Check the Element app conditions score before your next dive so you’re hunting when yellowtail are active and conditions are safe — the best fish dinner starts with the best dive day.