Spearfishing Bonito Around San Diego’s Kelp Forests: Hunting Tactics

Bonito are aggressive, fast, and abundant in San Diego’s kelp forests from May through October. Unlike the larger yellowtail or white sea bass, bonito reward patient hunters with consistent action and excellent table fare. If you’re hunting around Point Loma, La Jolla Shores, or the Coronado Islands, understanding bonito behavior in kelp will dramatically improve your success rate.

Where Bonito Hunt in Kelp

Bonito use kelp forests as feeding grounds and ambush points. They patrol the edges where kelp density transitions from thick to sparse—these are the highways where smaller fish congregate. Focus your hunting along:

• The outer kelp perimeter at Point Loma (40–65 feet), where the canopy thins and light filters through
• La Jolla Shores kelp beds (35–55 feet), particularly near the sandy gaps between dense patches
• Coronado Islands’ western side (50–80 feet), where current pushes baitfish into predictable lanes

Bonito rarely hunt deep within the densest kelp. They need room to accelerate and turn. Look for them in the open pockets and along the kelp-to-sand transitions.

Seasonal Patterns and Timing

May through July is peak bonito season in San Diego. Water temps climb into the mid-60s, and bonito become voracious. Early morning dives (first light to mid-morning) yield the most aggressive strikes. By August and September, afternoon tides often push bonito closer to shore, but water clarity can drop—plan around swell forecasts and avoid choppy conditions.

October sees a sharp decline in numbers as water cools. If you’re hunting bonito, prioritize the summer window.

Hunting Tactics That Work

Move Slowly and Deliberately

Bonito have excellent eyesight but rely heavily on detecting movement and vibration. Glide along the kelp edge rather than kicking hard. Minimize fin strokes. When you spot a bonito, freeze completely—don’t chase. Let the fish’s curiosity work in your favor. Many bonito will approach a stationary diver, especially if you’re positioned downwind (down-current).

Use the Kelp as Cover

Approach from behind the kelp canopy when possible. Bonito hunt with their heads slightly upward, scanning for movement above. Slide along the kelp stalk side rather than the open face. This gives you a moment of surprise as you emerge from cover.

Stalk Solo or in Pairs

Bonito spook easily from multiple divers. Hunt alone or with one partner. More divers mean more movement and more chance of alerting fish. Coordinate with your partner to cut off escape routes—position one diver upcurrent while the other moves in for the shot.

Target the Larger Schools

Bonito often travel in loose schools of 3–10 fish. Larger schools are less spook-prone; individual fish are hypervigilant. When you locate a school, identify the largest or most aggressive fish and focus on it. They’re more likely to charge a bait or react to your presence.

Shot Placement and Gun Selection

Bonito are small targets (2–4 pounds typical, 5–8 pounds exceptional). A mid-range speargun (36–40 inches) is ideal. Longer guns create excessive drag in kelp; shorter guns sacrifice accuracy at distance.

Aim for the head or just behind the gill plate. A brain shot drops them instantly. A body shot often results in a panicked fish tangled in kelp or breaking your line. Bonito are muscular and fight hard even when lightly hit. Precision matters.

Keep your gun loaded and ready at all times. Bonito strike fast. The moment you’re in position, be prepared to shoot—you may only get one chance before the school bolts.

Breath-Hold Technique

Hunt bonito at 40–70 feet, which demands efficient breath-holding. Descend slowly and relax on the bottom. Anxiety burns oxygen and clouds your judgment. Spend 60–90 seconds on the seafloor scanning for movement. If no fish appear, ascend, recover, and reposition.

Never push your limits. Shallow-water blackout is real. Hunt with a partner and follow standard safety protocols.

Rigging and Line Management

Use a float line if hunting deeper than 60 feet. Bonito will drag you down into kelp if tethered directly. A float line gives you control and prevents snags. Keep your shooting line short (6–8 feet) to reduce entanglement risk.

The Payoff

A bonito in the cooler is a guaranteed meal. They’re lean, oily, and perfect for grilling or smoking. A successful hunt in San Diego’s kelp forests—whether at Point Loma or the Coronados—combines stealth, patience, and local knowledge.

Use the Element app to monitor water temperature, swell, and visibility before heading out. Optimal bonito conditions are often forecast 24–48 hours ahead, so plan accordingly.