How to Catch Octopus When Sea Fishing: A Complete Guide to Techniques, Senses, and Gear

Octopuses are the sneaky, brainy geniuses of the sea—let’s be real, every angler who’s tried to catch them knows it’s less about brute strength or waiting around and more about outsmarting these eight-armed tricksters. I’ve been fishing for years, but my first drift fishing trip for octopus? Total chaos. It was a few years back, north of Longshi, in shallow waters less than 10 meters deep. I was hyped to try, but I had no clue what I was doing. A fellow angler tossed me a quick tip: “Just drop the grapnel hook straight to the bottom, wait 20 seconds, then yank hard. If it feels heavier, that’s an octopus clinging on—rinse and repeat.”

I gave it a go, and hey, it worked! Not every cast, but I caught some octopuses. I was stoked… but then a thought hit me: Is this really all there is to getting a good haul? Fast forward a few years, and I noticed the guys on the same boat who stuck to that old method were catching less and less each year. Yeah, ocean resources are dwindling, but I couldn’t help thinking: What if I could tweak my approach instead of just accepting it? So I started experimenting, tweaking little things here and there, and guess what? My catch rate shot up. By 2025, I was often catching twice as much as the others on the boat! Today, I’m spilling my secrets—no fancy jargon, just real lessons from hours of trial and error.

Mastering Lift Amplitude and Frequency: The Make-or-Break of Octopus Fishing

First off, let’s get this straight: The longer your grapnel hook stays in contact with the seabed, the better your chances of an octopus latching on. But here’s the catch—you can’t just drop it and forget it. The captain picks the spot, right? They go for calm currents and flat seabeds to slow the boat’s drift and keep the hook from getting stuck. But as the angler, you’ve got to adapt to changing seabeds, currents, and boat speeds. That’s where lift amplitude (how much you yank the rod) and frequency (how often you do it) come in.

Adjusting Lifts for Different Seabeds

Not all seabeds are the same, and your lift game needs to match:

• Flat, Smooth Seabeds: When the bottom’s even, let the hook hit the seabed, wait 10 seconds, then give a gentle, small lift. If nothing happens, repeat. The goal? Keep the hook touching the seabed as much as possible—octopuses love hanging out there.
• Shell-Covered Seabeds: This is trickier. There are tons of shells, so you need to maximize the time the hook is near them (octopuses hide in shells!). I hold the rod at its balance point, keep the tip slightly low, and move it in small, rhythmic ups and downs as the boat sways. This lets the hook glide just above the shells—close enough for octopuses to spot, but not so close it gets snagged.

Timing Is Everything: React Fast When They Latch On

Once you feel that telltale “something’s there” (we’ll talk about the senses next!), don’t hesitate. Yank the rod up hard to set the hook, reel in fast, unhook the octopus, and immediately cast again. Every second counts—octopuses are quick, and you don’t want to miss the next one.

Currents Dictate Your Rhythm

Ocean currents are like the sea’s mood swings, and you’ve got to dance with them:

• Slow Currents: Go low and slow. A gentle, small lift every 10-15 seconds keeps the hook steady without scaring octopuses away.

• Fast Currents: Step it up! The current will drag your hook faster, so lift higher and more often to keep it in contact with the seabed. If you don’t, the hook might float away before an octopus even sees it.

Reading the Senses: How to Feel an Octopus Latch On

Here’s the magic part—catching octopuses isn’t just about technique; it’s about tuning into the subtle signals your rod sends. Most people only talk about the “weight gain” feeling, but there are two more secret senses you need to master. Let me break them down:

1. The Weight Gain: The Obvious (But Tricky) Signal

When an octopus clings to your hook, you’ll feel extra resistance or heaviness when you lift. Big octopuses make this obvious—like someone added a rock to your line. But small ones? Their weight is so light you might miss it if you’re not paying attention. I’ve lost count of how many tiny octopuses I let get away at first because I thought the line was just snagged on seaweed. Pro tip: Keep a light grip on the rod so you can feel even the tiniest changes.

2. The Floating Sensation: The Sneaky Mid-Drop Catch

Octopuses aren’t couch potatoes—they swim around looking for food, not just waiting on the seabed. Sometimes, they’ll spot your hook as it’s falling and latch on mid-drop. When this happens, your line will feel like it’s floating—soft, buoyant, like there’s a tiny balloon on the end. It’s a weird, almost magical feeling, and you have to act fast! If you wait until the hook hits the bottom, the octopus might let go.

3. The Soft Touch: The Underestimated Signal

This one’s my favorite. When your hook hits the seabed, normally it feels hard—like tapping a rock. But if an octopus is already clinging to it? It feels like dropping a cotton ball. That’s the octopus’s soft body cushioning the hook’s landing. You have to be super in tune with your rod to notice this, but once you do, it’s a surefire catch. I’ve had days where half my octopuses came from this soft touch—total game-changer.

Choosing the Right Gear: The Grapnel Hook That Makes All the Difference

You can have all the technique in the world, but if your gear sucks, you’re wasting your time. The star of the show here is the grapnel hook—let’s talk about how to pick the perfect one.

Weight Matters: Not Too Heavy, Not Too Light

I’ve tested so many hook weights, and the sweet spot? Around 150 grams total (hook plus sinker). Here’s why:

• Too Heavy (Over 150g): It sinks fast, but it’s clunky. You won’t feel those subtle signals (like the floating or soft touch) because the weight drowns them out. Plus, it’s way more likely to get snagged on rocks or shells.
• Too Light (Under 150g): It sinks slow, so it might not reach the seabed before the current drags it away. It’s sensitive, but you’ll spend more time reeling in a drifting hook than catching octopuses.

Maintain Your Hook: Don’t Let Octopuses Escape

After every catch, check your hook—seriously. Octopuses are strong, and they can bend the hook or dull the tip. Here’s your post-catch routine:

• Check the Angle: If the hook is bent, straighten it immediately. A wonky hook won’t latch onto octopuses properly.

• Sharpen the Tip: Dull hooks mean octopuses can slip off mid-reel. Keep a small sharpening stone in your tackle box—30 seconds of sharpening saves you from losing big catches.

Bonus: The Double-Rod Method (For the Overachievers)

Some guys on my boat swear by using two rods at once. Here’s how they do it:

• One rod for active fishing (small lifts, fast casts)

• One rod for passive fishing (letting the hook sit on the seabed longer)

It’s a bit chaotic at first—you’ve got to keep an eye on both rods—but it can double your catch. Just make sure you don’t get the lines tangled! I’ve seen someone spend 20 minutes untangling rods instead of fishing… not ideal.

At the end of the day, sea fishing for octopuses isn’t just a hobby—it’s a brain game. You’re not just catching a fish; you’re outsmarting a creature that’s smarter than most people give it credit for. I still get a kick out of that soft touch or floating sensation—like the octopus and I are playing a little game of cat and mouse. If you try these tips, let me know how it goes! And if you’ve got your own octopus-fishing hacks, drop them in the comments—I’m always looking to learn more.