The 10 Best Fish Finders

Updated September 25, 2017 by Brett Dvoretz

10 Best Fish Finders
Best High-End
Best Mid-Range
Best Inexpensive
We spent 43 hours on research, videography, and editing, to review the top choices for this wiki. Using one of these fishfinders seems a little like cheating to us, but whatever floats your boat (sorry!). We've researched all the options to find the best hand-held and mountable models to help you locate that monster catch you've been looking for. In addition to finding fish, most can determine water depth and temperature, too. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best fish finder on Amazon.

10. Lucky FFW-718

The Lucky FFW-718 is compact, comfortable to use, and will detect both the locations of fish and water depth in fresh and saltwater environments. Also, its built-in sensor is designed to shut off automatically when out of the water to conserve the battery.
  • led backlighting for nighttime use
  • hard to see when wearing sunglasses
  • doesn't work well in choppy water
Brand Lucky
Model FFW-718
Weight 12 ounces
Rating 4.0 / 5.0

9. Venterior VT-FF001

Built for versatility, the Venterior VT-FF001 can be fixed to your boat's hull, floated in the water, pole-mounted, and even placed beneath the ice for efficient monitoring. It can detect weed, sand, and rocks along the seabed.
  • shows depth in meters or feet
  • adjustable sensitivity
  • receiver isn't very water-resistant
Brand Venterior
Model VT-FF001
Weight 1.2 pounds
Rating 4.1 / 5.0

8. Lowrance Hook-3X

The Lowrance Hook-3X doesn't have the clearest onscreen image, but that shouldn't be expected for a sub-$100 model. What it can do, though, is accurately identify fish in a 20-degree conical coverage range so you know if it is time to drop your lure or bait.
  • two sonar frequencies to choose from
  • must use it at speeds below 10mph
  • doesn't work well in murky water
Brand Lowrance
Model 000-12635-001
Weight 2.4 pounds
Rating 3.7 / 5.0

7. Garmin Striker 7SV

The Garmin Striker 7SV uses a very high frequency sonar to give you a clear picture of the underwater environment around your boat. It has a helpful history rewind feature that lets you scroll back through imagery to identify areas with a lot of fish you may have missed.
  • displays boat speed data
  • tilt-swivel mount
  • split-screen viewing
Brand Garmin
Model 010-01809-00
Weight 5.2 pounds
Rating 3.6 / 5.0

6. HawkEye FT1P Fish Trax

The HawkEye FT1P Fish Trax is a low cost handheld model that can read bottoms and identify fish up to 240 feet deep. It has a handy fish locator alarm so you don't have to spend all your time staring at the screen or risk missing a potential catch.
  • helpful rock and weed indicators
  • easy to navigate interface
  • screen is black and white
Brand HawkEye
Model FT1P
Weight 1.4 pounds
Rating 3.9 / 5.0

5. Raymarine Dragonfly 4 Pro Navionics+

The Raymarine Dragonfly 4 Pro Navionics+ has an all-weather display screen so you are free to take it on the roughest seas, which is great because all anglers know the worst boating days are the best fishing days. It produces photo-like images of underwater objects.
  • can stream data to a smartphone
  • comes with us lake and coastal maps
  • downvision and standard sonar
Brand Raymarine
Model E70294-NAG
Weight 3.2 pounds
Rating 3.9 / 5.0

4. Deeper Smart Sonar PRO+

The Deeper Smart Sonar PRO+ is the best portable fish finder on the market. It can be used from a boat or cast from shore up to 330 feet away to any area where you want to map the bottom or scan for fish. Once in the water it transmits data to your smartphone.
  • small enough to fit in a tackle box
  • battery lasts nearly six hours
  • easy to identify onscreen images
Brand Deeper
Model DP1H10S10
Weight 11.4 ounces
Rating 4.2 / 5.0

3. Humminbird Helix 5 SI

The Humminbird Helix 5 SI has a convenient micro-SD card slot for storing extra maps and waypoints and a backlit display that is bright enough to see in the middle of the day. The 5-inch screen is large enough to examine bottom structures in great detail.
  • four thousand watt ptp power output
  • water temperature alarm
  • 180-degree underwater perspective
Brand Humminbird
Model 409640-1
Weight 7 pounds
Rating 4.9 / 5.0

2. Garmin Striker 4

The Garmin Striker 4 is a good choice for small boats. It doesn't take up too much space on the instrument panel yet still features a full-color 3.5-inch screen. It addition to finding fish, its built-in GPS makes it easy to mark your favorite fishing spots.
  • budget-friendly price
  • simple keypad operation
  • includes a chirp sonar transducer
Brand Garmin
Model 010-01550-00
Weight 2.1 pounds
Rating 4.5 / 5.0

1. Lowrance HDS-7 GEN3

The Lowrance HDS-7 GEN3 offers the benefits of a large icon-driven, full-color touchscreen, an extremely fast processor, wireless connectivity for easy map downloads, and an intuitive keypad operation when water conditions get rough.
  • internal gps antenna
  • compatible with nmea 2000 devices
  • supports autopilot control
Brand Lowrance
Model 000-11784-001
Weight 6.2 pounds
Rating 4.8 / 5.0

Treasures Under The Sea

If you consider fishing a pastime, an interactive art form, or even a necessity to keep your business afloat, then a fish finder can be a great tool to help you realize one or all of these values.

A fish finder functions by detecting the reflected pulses of sound energy as they bounce off of objects under the water, very similar to how sonar technology operates. Most modern fish finders feature graphical displays that show measurements of such reflected sounds, the time it takes for the sound echoes to return, and the distance to the object based on that information. Fish finders send and receive signals many times per second.

Individual sound pulses are concentrated into a beam transmitted by a transducer, which takes the electrical signal from your transmitter, converts it into sonar, and then sends it out. The transducer captures all returning echoes and converts them back into electrical signals. When the transducer transmits a sound into deep water (approaching the seabed), the beam expands as it descends, thereby covering a wide range. Imagine this beam in the shape of a large triangle. The apex would be closest to your boat, while the base of the triangle would be represented by the seabed. Everything within the area of the triangle (in between the boat and seabed) represents the detection area. Depending on the consistency of the seabed, the return signal may be weak or strong. Hard, rocky sea bottoms tend to send back strong signals, whereas soft and muddy bottoms tend to absorb the signal. The fish finder displays these signal differences to make a distinction between the sea bottom and everything above it.

Wow. That's interesting, but how do I know the device is actually going to detect fish? Good question. Fish finders detect the presence of fish underwater by leveraging the air in their swim bladders. The conserved air in the swim bladder changes the path of the sound and reflects that energy back to the device, which then displays that detection as an image of a fish on its display screen.

Fish finders also function at high sound frequencies, typically between 20-200 kHz as this helps to define targets, while allowing the devices to display fish as unprocessed sonar return signals, also called arches. Low sound frequencies can penetrate deeper waters, but they may not be as powerful as the high-sound frequencies to detect specific targets.

Go Fish

There are several things to consider when hunting for the right fish finder. If, for example, you tend to fish in shallow waters, one that offers high frequencies is the way to go, since high-frequency signals means greater detail on your device's digital display. Other types of fish finders deliver multiple frequency options, which is useful if you're a business owner and tend to fish in a variety of different types of water.

Increased wattage works to your advantage when fishing in very deep waters because the device can display readings quickly and penetrate deep into the ocean without losing its degree of detection accuracy. By contrast, low-wattage translates to slow readings, so if you find yourself in shallow waters, then you can go with a less powerful device. On the same note, some fish finders feature sensors with auto shutoff capabilities when the device is out of the water, which is great for conserving battery life.

Having a fish finder with a clear and bright color display also makes the detail easy to distinguish in the sunlight as opposed to black and white displays.

Using a fish finder that's compact, lightweight, and capable of being mounted to your boat's hull, floated in the water, or even pole-mounted gives you the best chances for getting the most out of your device's detection capabilities.

A Brief History Of The Fish Finder

Fishfinders were dervied from fathometers, which are active sonar instruments designed for both navigation and measuring water depth. The earliest fathometers used a rotating light at the edge of a circle that flashed in sync with a received echo, which corresponded to depth. The problem with these fathometers is that they did not keep historical depth records, nor were they very accurate when waters were rough.

As early as 1948, a device for detecting fish underwater was developed in Nagasaki, Japan by the Furuno brothers (Kiyotaka and Kiyokata), who co-owned a small marine electrical company. A private talk with a fellow fisherman lead the brothers to discover that air bubbles could be used to detect the presence of fish. Kiyotaka, the older brother, started developing a fish finder using scrap materials, while Kiyokata, the younger brother, continued to bring the prototype onboard a fishing vessel over and over again to perfect the design. Kiyokata was eventually bestowed with the nickname god of sardine due to his success in finding fish schools everywhere. The Furuno brothers' innovation permanently changed the face of the fishing industry, as it transformed the industry into a scientific practice instead of forcing fishermen to depend only on their past experiences or intuition for success.

In 1957, Carl Lowrance, an avid fisherman, shared his love for fishing with his sons, Darrell and Arlen. Together, they designed the world's first high-frequency, transistorized sonar for sport fishing and boating purposes. In 1959, Lowrance introduced the first Little Green Box portable sonar unit and it became one of the most popular sonars in the world.

Today's fish finders feature state-of-the-art LCD screens, built-in GPS, charting capabilities, and integrated transducers.

Statistics and Editorial Log

Paid Placements

Wiki Granular Update & Revision Log

help support our research

Patreonlogoorange psj5g7Wiki ezvid low poly earth xdypeb

Last updated on September 25, 2017 by Brett Dvoretz

A wandering writer who spends as much time on the road as behind the computer screen, Brett can either be found hacking furiously away at the keyboard or perhaps enjoying a whiskey and coke on some exotic beach, sometimes both simultaneously, usually with a four-legged companion by his side. He hopes to one day become a modern day renaissance man.

Thanks for reading the fine print. About the Wiki: We don't accept sponsorships, free goods, samples, promotional products, or other benefits from any of the product brands featured on this page, except in cases where those brands are manufactured by the retailer to which we are linking. For our full ranking methodology, please read about us, linked below. The Wiki is a participant in associate programs from Amazon, Walmart, Ebay, Target, and others, and may earn advertising fees when you use our links to these websites. These fees will not increase your purchase price, which will be the same as any direct visitor to the merchant’s website. If you believe that your product should be included in this review, you may contact us, but we cannot guarantee a response, even if you send us flowers.