The Complete Guide to Fish Surfboards: Why Every Surfer Needs One in Their Quiver

The Most Fun You'll Ever Have on a Surfboard

Ask a hundred experienced surfers what the most fun board in their quiver is, and a surprising number of them will say the same thing: the fish.

Not their high-performance shortboard. Not their trusty longboard. The fish — that wide, flat, swallowtail oddball that looks like it shouldn't work as well as it does. There's something almost magical about what a well-shaped fish does to a wave. It generates speed where no speed should exist. It glides through flat sections that would stall a thruster. It makes mushy, knee-high surf feel like the best session of your life.

But the fish isn't just a small-wave novelty. In the right hands and the right conditions, a fish can handle everything from ankle-high mush to solid overhead surf. It's a board that rewards good technique, forgives bad habits, and — perhaps most importantly — reminds you why you started surfing in the first place: because riding waves is supposed to be fun.

Whether you're thinking about adding a fish to your quiver, replacing your daily driver, or just curious about what makes this shape so special, this guide will cover everything you need to know.

A Brief History of the Fish

The fish surfboard has a fascinating origin story — one that starts not in the ocean, but in a swimming pool.

In the early 1970s, a San Diego kneeboarder named Steve Lis was experimenting with short, wide boards designed for the powerful reef breaks around the La Jolla and Sunset Cliffs area. Lis wasn't a stand-up surfer, so he didn't care about the conventions of shortboard design. He needed something that would generate speed on steep, hollow waves while being ridden from a kneeling position.

What he came up with was radical: a board that was dramatically shorter and wider than anything being ridden at the time, with a deep swallowtail (the "fish tail" that gives the board its name) and twin keel fins. The design drew loosely from the shape of a fish — wide through the body, split at the tail — and it worked astonishingly well.

Stand-up surfers quickly noticed. Guys like Jeff Ching, Skip Frye, and Larry Gephart began adapting the Lis fish for stand-up surfing, and the design spread through the San Diego surf community like wildfire. By the mid-1970s, fish surfboards were being ridden at spots up and down the California coast.

Then the thruster arrived. Simon Anderson's three-fin design in 1981 changed everything, and for the better part of two decades, the fish was relegated to the back of the garage — a weird relic from a pre-thruster era.

The revival came in the early 2000s. Shapers like Rich Pavel, Marc Andreini, and the crew at Mandala began revisiting the fish design with modern materials and refined understanding of hydrodynamics. Tom Curren — one of the greatest surfers of all time — famously rode a fish in competition and free-surfing, demonstrating that the design wasn't just viable but genuinely high-performance. Rob Machado followed suit, eventually launching his own fish-inspired board line.

Today, the fish is everywhere. Every major surfboard brand offers at least one fish model, and the design has branched into dozens of variations. It's no longer a niche or retro curiosity — it's a mainstream, essential surfboard shape.

What Makes a Fish a Fish?

Not every short, wide board is a fish. The fish has specific design elements that work together to create its unique ride characteristics. Understanding these elements will help you choose the right fish and ride it more effectively.

Width and Volume

A fish is wider and thicker than a shortboard of equivalent length. Where a typical 5'10" shortboard might be 18.5" wide and carry 27 liters of volume, a 5'10" fish might be 20.5" wide with 35+ liters. This extra width and volume does several things:

• Increases paddle power — more foam means more flotation, which means you catch waves earlier and with fewer strokes
• Creates planing speed — the wider outline acts like a planing hull, allowing the board to skim across flat water rather than digging in
• Improves stability — the wider platform makes the board more forgiving, especially in choppy or disorganized surf

Flat to Low Rocker

Rocker — the curve of the board from nose to tail — is perhaps the single most important design element of a fish. Fish surfboards have significantly less rocker than shortboards, particularly through the middle and tail sections.

Low rocker means the board sits flatter on the water, which maximizes the planing surface area in contact with the wave. This is what gives a fish its characteristic speed — it's not fighting the water, it's gliding across it. The trade-off is that less rocker means less ability to fit into steep, curved sections of a wave. A fish won't handle late drops or critical vertical surfing as well as a rockered-up shortboard. But in the kind of waves a fish is designed for — fat, mushy, shoulder-high and under — that speed advantage is transformative.

The Swallowtail

The fish tail — a deep V-shaped split in the tail — is the defining visual characteristic of the shape. But it's not just aesthetic. The swallowtail serves important hydrodynamic functions:

• Two release points — each half of the tail acts as an independent release point, allowing water to exit cleanly from both sides. This reduces drag and increases speed.
• Increased tail width — the swallowtail allows the designer to keep the tail wide (for planing speed) while still providing release points (for maneuverability). A square tail this wide would be uncontrollable.
• Looseness in turns — the split tail creates a slight pivot point, making the board feel looser and more responsive than its wide outline would suggest.

Twin Fins (and Variations)

The classic fish is a twin-fin, typically with keel-style fins — large, upright, raked fins that provide drive and hold without the drag of a center fin. Twin fins create a very different riding experience than thrusters:

• Less drag — two fins instead of three means less resistance through the water, which means more speed
• Flowing, skatey feel — without a center fin to provide a fixed pivot point, the tail slides more freely. Turns feel looser, more drawn-out, and more connected
• Speed through turns — twin fins maintain speed through turns where a thruster would slow down, because there's less fin area creating drag

Many modern fish designs offer variations on the twin-fin setup:

• Twin + trailer — a small center fin (the "trailer") added behind the twin fins for extra hold, especially in larger surf. This is sometimes called a "2+1" setup.
• Quad fins — four fins arranged in two pairs. Quads offer more hold than twins with a similar speed advantage over thrusters. Many modern performance fish use quad setups.
• Twin keels — the traditional setup. Large, deep-based keel fins with significant rake. Maximum speed, maximum flow.

When to Ride a Fish

The fish excels in specific conditions. Understanding when to grab your fish (and when to leave it in the car) will help you get the most out of the board.

Ideal Conditions

Small to medium surf (waist to head-high). This is the fish's wheelhouse. When the waves are too small for your shortboard to generate any speed, a fish will fly. Knee-high waves that feel impossible on a 5'10" thruster become genuinely fun sessions on a fish.

Mushy, fat waves. The flatter rocker and wider outline of a fish are specifically designed to plane across soft, weak wave faces. Where a shortboard bogs and stalls, a fish glides.

Beach breaks with multiple peaks. Fish surfboards paddle fast and catch waves easily, making them ideal for beach breaks where you need to move around the lineup and take off on shifting peaks.

Light offshore or glassy conditions. A fish is at its absolute best when the water is clean and the wind is light. The wide planing surface tracks beautifully on smooth wave faces.

Crumbly point breaks. Long, slow, rolling point break waves are fish heaven. The board's natural speed carries you through flat sections that would kill your momentum on a narrower board.

When to Leave the Fish at Home

Steep, hollow surf. The low rocker of a fish makes late takeoffs on steep waves difficult and dangerous. If the waves are pitching and you need to air-drop, grab your shortboard.

Overhead-plus surf (unless you're experienced). As waves get bigger, the lack of a center fin and the wide outline of a fish can make it feel unstable and hard to control. Experienced fish riders can push the design into solid surf, but it takes skill and confidence.

Strong onshore wind. The wide outline and flat rocker of a fish make it more susceptible to chop. In bumpy, windy conditions, a narrower board with more rocker will handle better.

Heavy, barreling waves. A fish isn't designed for the pocket of a heavy barrel. The wide nose and low rocker make it prone to pearling on steep drops, and the lack of a center fin reduces hold on the wall of a hollow wave.

How to Choose the Right Fish

Sizing Your Fish

The general rule for fish sizing is: ride it 2 to 6 inches shorter than your standard shortboard, but with significantly more volume. If you normally ride a 6'0" shortboard, a fish in the 5'6" to 5'10" range will likely be right.

Here's a more specific framework:

• Beginner to intermediate surfers: Go bigger. A fish that's only 2" shorter than your shortboard with 25-30% more volume will be easy to paddle, stable, and forgiving. You can always size down later.
• Intermediate to advanced surfers: A fish 3-4" shorter with 15-20% more volume gives you the speed advantage while still allowing you to push the board's performance envelope.
• Advanced surfers: You can go 4-6" shorter with 10-15% more volume for a fish that's nimble, fast, and responsive. At this level, you'll be comfortable with the looser feel and can use the board's speed to your advantage.

Retro Fish vs. Modern Fish

This is the big decision, and it comes down to what you want out of the board.

Retro Fish:

• Wider, flatter, thicker
• Twin keel fins
• Deep swallowtail
• Maximum glide and speed
• Looser, skatier feel
• Best for: surfers who want that classic, flowing fish experience; small wave specialists; anyone who values pure fun over performance

Modern/Performance Fish:

• Slightly narrower, more refined rails
• Quad or twin+trailer fin setup
• Moderate swallowtail or even rounded pin
• Better hold in steeper waves
• More responsive, tighter turning radius
• Best for: surfers who want fish speed with shortboard-like maneuverability; intermediate surfers stepping down from a shortboard; conditions that occasionally get powerful

Materials Matter

Fish surfboards are shaped in a variety of constructions, and each affects the ride:

• Polyurethane (PU) / polyester — the traditional construction. Heavier, with a smooth, dampened feel. Many shapers prefer PU for fish because the extra weight helps the board hold momentum and gives the flex pattern a lively, organic quality.
• EPS / epoxy — lighter, more buoyant, and snappier. Epoxy fish float higher and paddle faster, but some surfers find them too light and "corky." Great choice if you want maximum paddle power.
• Alternative materials — some shapers build fish using wood, recycled foam, or bio-resins. These can offer unique flex patterns and are more environmentally friendly.

How to Ride a Fish

Riding a fish well requires adjusting your approach from how you ride a shortboard. The board has different strengths and wants to be surfed differently.

Paddling and Catching Waves

One of the first things you'll notice on a fish is how much easier it paddles. The extra volume and width give you a significant advantage in the lineup. Use this to your advantage:

• Sit farther outside. You can catch waves earlier than the shortboarders around you. Position yourself a few yards deeper and take off on waves before they steepen.
• Paddle with confidence. A fish only needs two or three hard strokes to catch a wave that would require six or seven on a shortboard. Trust the board's paddling ability and commit early.
• Angle your takeoff. Because a fish generates so much speed down the line, angling your takeoff toward the shoulder (rather than going straight) lets you immediately set your rail and start flowing.

Generating and Maintaining Speed

A fish generates speed differently than a shortboard. On a thruster, you pump and compress through turns to build speed. On a fish, speed comes from trim — finding the right line on the wave and letting the board's design do the work.

• Use your rail. The best fish surfers spend most of their time on rail, drawing long, flowing lines across the wave face. When you engage a rail on a fish, the board accelerates. This is where the magic happens.
• Pump less, trim more. Resist the urge to pump a fish like a shortboard. The board already wants to go fast. Instead, focus on subtle weight shifts and finding the high line on the wave.
• Use the whole wave. A fish carries speed through sections that would stall a shortboard, so use that speed to connect sections. Ride higher on the wave face, project across flat spots, and let the board's glide carry you.

Turning a Fish

This is where most surfers need the biggest adjustment. A fish doesn't turn like a thruster, and fighting it will only lead to frustration.

• Think arcs, not pivots. A fish wants to draw smooth, flowing arcs rather than sharp, pivoty snaps. Embrace this. The most beautiful fish surfing is all about long, drawn-out carves and graceful direction changes.
• Lead with your front foot. On a thruster, turns are driven primarily from the back foot. On a fish, shifting weight to your front foot and leading turns with your upper body creates smoother, more controlled direction changes.
• Use speed to turn. A fish turns best when it's moving fast. If you try to force a turn from a slow speed, the wide tail will resist. Build speed first, then redirect it into your turn.
• Commit to your bottom turn. The bottom turn is everything on a fish. A good bottom turn on a fish — rail fully engaged, driving off the bottom with speed — sets up everything that follows. Don't rush it.

Advanced Fish Techniques

Once you're comfortable with the basics, a fish opens up some unique maneuvers:

• Slide turns and tail releases. The twin-fin setup allows you to break the tail free in a controlled slide. This is one of the most stylish and fun maneuvers in surfing.
• Speed runs and projections. Use the fish's speed to project out of sections and across flat spots. A fast fish rider can cover incredible amounts of wave.
• Down-the-line trim. There's an art to finding the perfect trim line on a fish — that sweet spot where you're locked in, the board is humming, and you're just flying. It's one of surfing's purest feelings.

Building Your Quiver Around a Fish

For many surfers, the fish becomes the board they reach for most often. Here's how it fits into a broader quiver:

• Fish as daily driver. If you surf mostly waist-to-shoulder-high beach breaks, a fish might be all you need 80% of the time. Pair it with a step-up shortboard for the bigger days and you're covered.
• Fish as complement to a shortboard. Keep your shortboard for overhead, powerful days and grab the fish for everything else. You'll surf more sessions and have more fun on the smaller days.
• Fish as complement to a longboard. If you primarily ride a longboard, a fish is the perfect step-down. It's short enough to feel maneuverable but voluminous enough that the transition isn't jarring.

Recommended Fish Models to Try

While the best fish is always one shaped specifically for you by a local shaper who understands your waves and your surfing, here are some widely available fish models worth trying:

• Channel Islands CI Fish — a modern, quad-fin fish that bridges the gap between retro glide and contemporary performance
• Lost RNF '96 — Rob Machado's signature fish, refined over decades. A twin-fin with incredible speed and flow
• Firewire Seaside — Rob Machado's collaboration with Firewire. A modern take on the classic fish outline in Firewire's durable Helium construction
• Album Surf Discofish — a retro-leaning twin keel fish with beautiful craftsmanship and that classic, skatey feel
• Pyzel Astro Pop — a modern fish/hybrid with versatile quad-fin setup for surfers wanting performance in a fish outline

The Fish Will Change Your Surfing

There's a reason the fish has endured for over fifty years while countless other surfboard designs have come and gone. The shape works. It's fast, it's fun, and it forces you to approach waves differently than you would on a shortboard.

Riding a fish teaches you to read waves for speed rather than power. It teaches you to find the high line, to use your rail, to flow rather than force. These skills transfer directly back to your shortboard surfing — many surfers report that spending time on a fish actually improves their thruster riding because it develops a more intuitive sense of speed, trim, and wave positioning.

But beyond the technical benefits, a fish reminds you of something important: surfing is supposed to be fun. Not every session needs to be a performance workout. Sometimes the best surf sessions are the ones where the waves are small, the water is warm, and you're just gliding on a board that seems to turn every ripple into a ride.

If you don't have a fish in your quiver yet, fix that. Your small-wave days will never be the same.