Top Menu

Out of Stock

Modern Blackfish Surfboard

Modern Blackfish X1 Surfboard

Rated 5.00 out of 5 based on 3 customer ratings
(3 customer reviews)

Find a Dealer Locate your nearest GSI Dealer
SKU: 455 Categories: , Brand:
  • Description
  • Specifications
  • Video
  • Technical Info
  • Reviews

Product Description

The Modern Blackfish surfboard combines usability and performance in a contemporary fish shape, and our X1 construction offers the strength, flex and performance advantages of epoxy at a very affordable price.

OUTLINE: Contemporary fish shape with the wide point shifted forward to assist with paddle efficiency. The tail narrows in the last 24 inches adding control and bite in steeper sections.

CONTOURS: The subtle single-to-double concave bottom feels very reliable and offers quick response in a variety of conditions.

ROCKER: The smooth, well-balanced rocker is designed to get you into waves early, accelerate fast off the bottom, and then maintain speed as you transition from one turn to the next.

FOIL: The Blackfish has plenty of volume under the chest and through the mid zone creating stability and making it very easy to paddle and ride. The domed deck leads out to performance rails that heighten sensitivity when turning.

The Modern Blackfish is very reliable and versatile enough to use everyday or on your next surfing adventure.


NOTE: rider weight is based on board volume and intermediate rider skill level.
6'0''20 3/4''2 5/8''36 ltrFCS M570kg / 154lb or less
6'4''21 1/4''2 3/4''40 ltrFCS M575kg / 165lb
6'8''21 1/2''2 7/8''44 ltrFCS M580kg / 176lb
7'0''21 3/4''3''48 ltrFCS M585kg / 187lb
7'4''22''3''52 ltrFCS M595kg / 209lb +


Technical Info


X1 Epoxy

X-1 Epoxy is a simple and effective construction using epoxy resin, woven fiberglass and a lightweight EPS core. The EPS core is cut directly from the shapers files, and once custom shaped, is glassed in the traditional hand layup method with multiple layers of woven fiberglass imported form the USA.

This versatile construction is lightweight, affordable, and is particularly suited to manufacturing SUP's. X-1 Epoxy boards are most popular for their subtle flex and memory recall properties, which translates into a board that feels light and responsive, and offers reliable performance regardless of the conditions.

You can find out more about GSI's surfboard construction on our surfboard technologies page

Board Concave


Single to double concave compresses and directs water flow adding lift and drive.


This is a mid volume rail.
Wave Height

1-8ft Waves

Surfer Skill Level

Beginner, Advanced, Intermediate


Submit A Review

5 out of 5 stars

3 reviews

Let us know what you think...


  1. 5 out of 5

    Took me a time to make duck diving reliably (36ltr/64kg) however the board is awesome and allows picking up small waves easy. Thanks guys! |m/

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  2. 5 out of 5

    Awesome board, picks up waves so easy.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  3. 5 out of 5 Blackfish X1

    I bought the Modern Blackfish X1 surfboard 3 weeks ago from a shop in Panama where I live at the moment. It is a perfect size and shape for my current ability level (comfortable catching 3-6′ waves). I was riding a 6’10” board with traditional polyurethane foam and polyester resin construction. This board has nearly the exact same width and depth but the loss of 10″ means that it is far more maneuverable and and overall much more enjoyable surfboard in most conditions. The epoxy construction also means that it is lighter and more durable.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...




Continue as a Guest

Don't have an account? Sign Up

You Might Also Need