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20 Best Saltwater Fish For 20 Gallon Tank (2022 Updated)

There are a number of different saltwater fish that can be kept in a 20 gallon tank. Some of the more popular choices include clownfish, damselfish, wrasses, and gobies. In terms of specific species, some good options include the ocellaris clownfish, blue damselfish, sixline wrasse, and orange spot goby.

It is important to do some research on the specific needs of each type of fish before making your purchase, as some saltwater fish require more care than others.

20 Best Saltwater Fish For 20 Gallon Tank

Product Image Product Name Features Price

Tetra 20 Gallon Aquarium Kit

  • Original

Fluval Sea Evo XII Aquarium Kit, 13.5 Gallon

  • Powerful 3-stage filtration with oversized mechanical, chemical and biological media
  • Stylish honeycomb design conceals back filtration area while looking ultra modern

Fluval Flex Saltwater Aquarium Kit 32.5 Gallon Black

  • Foam Filter Blocks with Handles2x.
  • Activated Carbon Inserts2x.
  • BIOMAX InsertsCirculation Pump with Output NozzleFluval Marine 3.

Tetra TetraMarine Saltwater Flakes – 5.65 oz

  • 5.65 oz

API Aquarium Starter Bundle Pack

  • 16 oz

API Aquarium Salt (16 oz)

  • 16 oz

SeaClear Acrylic Aquarium Combo Set Cobalt Blue 50 Gal Rectangular

  • Combo includes aquarium, reflector and electrical 24″ light fixture.
  • Acrylic aquariums are clearer than glass, 17 times stronger, and only half the weight!

Fluval Spec 16 Gal Aquarium Kit

  • Aquarium Size: 22in X 17.5in X 11.5in
  • The all-new SPEC, 60 L (16 US Gal) aquarium is equipped with efficient 3-stage filtration

API Aquarium Start Up Pack

  • 1 oz

Melafix Marine (16 oz)

  • 16 oz

Marina LED Aquarium Kit 20 Gallon

  • 68-litre glass aquarium
  • Stylish glass aquarium and canopy
  • Long-lasting, natural daylight effect LED lighting module incorporated into aquarium canopy

Tetra Aquarium Kit, 55-gal

  • Dimensions (Overall): 50.62 inches (L), 14.87 inches (H) x 23.12 inches (W)
  • Weight: 78.78 pounds
  • Capacity (Volume): 7040 ounces

Instant Ocean Sea Salt (200 gal)

  • Synthetic sea salt contains every necessary major, minor, and trace element needed for an aquarium
  • Developed through sophisticated biological and chemical testing

Clear for Life20R 20-Gallon Rectangle Aquarium – Black

  • 20 Gallon

Nuvo Fusion 20 Pro – AIO 20 Gallon Aquarium Kit – Innovative Marine

  • 20 Gallon

Innovative Marine Nuvo Fusion Lagoon 50 Pro AIO Aquarium Kit 50gal

  • 50 Gallons Tank Dimensions
  • 29.92″ L x 23.62″ W x 16.14″ H Glass Thickness
  • 10mm Return Type

Wholesale 100 Gallon Aquarium – Red & Gold

  • 100 Gallon

Coralife 32 Gallon LED BioCube Aquarium

  • Sleek modern hood with vibrant LED lighting
  • Integrated 24-hour timer with three independent channels
  • Compact and customizable filtration chamber

Worldwide Imports AWW84130 Live Nutri Seawater, 4.4-Gallon

  • Replenish your aquarium with this natural seawater
  • Contains live bacteria that helps create an inorganic balance
  • Synthetic salt mix helps maintain the pH balance of the water
Tetra 20 Gallon Aquarium Kit
  • Original
Fluval Sea Evo XII Aquarium Kit, 13.5 Gallon
  • Powerful 3-stage filtration with oversized mechanical, chemical and biological media
  • Stylish honeycomb design conceals back filtration area while looking ultra modern
Fluval Flex Saltwater Aquarium Kit 32.5 Gallon Black
  • Foam Filter Blocks with Handles2x.
  • Activated Carbon Inserts2x.
  • BIOMAX InsertsCirculation Pump with Output NozzleFluval Marine 3.
Tetra TetraMarine Saltwater Flakes – 5.65 oz
  • 5.65 oz
API Aquarium Starter Bundle Pack
  • 16 oz
API Aquarium Salt (16 oz)
  • 16 oz
SeaClear Acrylic Aquarium Combo Set Cobalt Blue 50 Gal Rectangular
  • Combo includes aquarium, reflector and electrical 24″ light fixture.
  • Acrylic aquariums are clearer than glass, 17 times stronger, and only half the weight!
Fluval Spec 16 Gal Aquarium Kit
  • Aquarium Size: 22in X 17.5in X 11.5in
  • The all-new SPEC, 60 L (16 US Gal) aquarium is equipped with efficient 3-stage filtration
API Aquarium Start Up Pack
  • 1 oz
Melafix Marine (16 oz)
  • 16 oz
Marina LED Aquarium Kit 20 Gallon
  • 68-litre glass aquarium
  • Stylish glass aquarium and canopy
  • Long-lasting, natural daylight effect LED lighting module incorporated into aquarium canopy
Tetra Aquarium Kit, 55-gal
  • Dimensions (Overall): 50.62 inches (L), 14.87 inches (H) x 23.12 inches (W)
  • Weight: 78.78 pounds
  • Capacity (Volume): 7040 ounces
Instant Ocean Sea Salt (200 gal)
  • Synthetic sea salt contains every necessary major, minor, and trace element needed for an aquarium
  • Developed through sophisticated biological and chemical testing
Clear for Life20R 20-Gallon Rectangle Aquarium – Black
  • 20 Gallon
Nuvo Fusion 20 Pro – AIO 20 Gallon Aquarium Kit – Innovative Marine
  • 20 Gallon
Innovative Marine Nuvo Fusion Lagoon 50 Pro AIO Aquarium Kit 50gal
  • 50 Gallons Tank Dimensions
  • 29.92″ L x 23.62″ W x 16.14″ H Glass Thickness
  • 10mm Return Type
Wholesale 100 Gallon Aquarium – Red & Gold
  • 100 Gallon
Coralife 32 Gallon LED BioCube Aquarium
  • Sleek modern hood with vibrant LED lighting
  • Integrated 24-hour timer with three independent channels
  • Compact and customizable filtration chamber
Worldwide Imports AWW84130 Live Nutri Seawater, 4.4-Gallon
  • Replenish your aquarium with this natural seawater
  • Contains live bacteria that helps create an inorganic balance
  • Synthetic salt mix helps maintain the pH balance of the water

1. Tetra 20 Gallon Aquarium Kit

Tetra 20 Gallon Aquarium Kit

  • Original

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Amazon.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 27.88 x 16.13 x 20.38 inches; 34.15 Pounds
Country of Origin USA
Item Package Dimensions L x W x H 28.5 x 20.3 x 15.9 inches
Item Dimensions LxWxH 27.88 x 16.13 x 20.38 inches

Reviews From Real Customers

flowerchild65
SpMcneal
Pamella

2. Fluval Sea Evo XII Aquarium Kit, 13.5 Gallon

Fluval Sea Evo XII Aquarium Kit, 13.5 Gallon

  • Powerful 3-stage filtration with oversized mechanical, chemical and biological media
  • Stylish honeycomb design conceals back filtration area while looking ultra modern
  • 14000 K high-output LED is appropriate for healthy coral growth

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Sold By Price
Amazon.com – Seller
eBay
Walmart – joshsfrogs
Petco.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 22 x 15 x 11.5 inches; 28 Pounds
Item Package Dimensions L x W x H 23.5 x 15.75 x 13.75 inches
Target Audience Keyword Fish
Age Range Description All Life Stages

Reviews From Real Customers

Dusten904
CMM2

3. Fluval Flex Saltwater Aquarium Kit 32.5 Gallon Black

Fluval Flex Saltwater Aquarium Kit 32.5 Gallon Black

  • Foam Filter Blocks with Handles2x.
  • Activated Carbon Inserts2x.
  • BIOMAX InsertsCirculation Pump with Output NozzleFluval Marine 3.

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay – countryfishgirl
SaltwaterAquarium.com
Fish Tanks Direct

Product Details

Reviews From Real Customers

Jerene
Bronwyn
jscl

4. Tetra TetraMarine Saltwater Flakes – 5.65 oz

Tetra TetraMarine Saltwater Flakes - 5.65 oz

  • 5.65 oz

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Amazon.com
eBay
Walmart – ILU4EVER LLC
PetSmart

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 3.63 x 3.63 x 7 inches; 7.36 Ounces
Country of Origin Germany
Item Package Dimensions L x W x H 7.17 x 3.54 x 3.5 inches
Item Dimensions LxWxH 3.63 x 3.63 x 7 inches

Reviews From Real Customers

saima.s
Sanlyn
portea.s

5. API Aquarium Starter Bundle Pack

API Aquarium Starter Bundle Pack

  • 16 oz

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Sold By Price
Amazon.com
eBay
Walmart – Avenue A Stores LLC
Chewy.com

Product Details

Specifications

Details
Product Dimensions 8 x 2.88 x 8.88 inches; 2.9 Pounds
Item Package Dimensions L x W x H 8.43 x 8.35 x 2.99 inches
Item Dimensions LxWxH 8 x 2.88 x 8.88 inches
Target Audience Keyword Fish
Style Starter bundle (3-pack)

Reviews From Real Customers

Skyler
DaveNate

6. API Aquarium Salt (16 oz)

API Aquarium Salt (16 oz)

  • 16 oz

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Amazon.com
Chewy.com
Petco.com
Pets Plus Natural

Product Details

Specifications

Details
Weight 1.16 lb

Reviews From Real Customers

CatCatCatfish
KingsHomeGym
JenGuerrero

7. SeaClear Acrylic Aquarium Combo Set Cobalt Blue 50 Gal Rectangular

SeaClear Acrylic Aquarium Combo Set Cobalt Blue 50 Gal Rectangular

  • Combo includes aquarium, reflector and electrical 24″ light fixture.
  • Acrylic aquariums are clearer than glass, 17 times stronger, and only half the weight!
  • More impact resistant and less prone to chipping or cracking than glass, making it safer around children and pets.
  • Safe for Salt or Freshwater.
  • You won’t believe how your fish and decorations will pop when viewing this beautiful SeaClear aquarium.

Check Latest Price

Sold By Price
Amazon.com
Sears – ErgodE

Product Details

Specifications

Details
Product Dimensions 36 x 15 x 20 inches; 20 Pounds
Country of Origin Mexico
Item Package Dimensions L x W x H 39.5 x 25 x 18.75 inches
Target Audience Keyword Fish
Shape Rectangular

Reviews From Real Customers

Geriatricsailer
PJV1
Daymun

8. Fluval Spec 16 Gal Aquarium Kit

Fluval Spec 16 Gal Aquarium Kit

  • Aquarium Size: 22in X 17.5in X 11.5in
  • The all-new SPEC, 60 L (16 US Gal) aquarium is equipped with efficient 3-stage filtration
  • High-output 7000 K LED for enhanced plant growth and fish colours
  • LED also features convenient touch-start day and night illumination
  • Oversized mechanical (foam), chemical (carbon) and biological (Biomax) media included

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
SaltwaterAquarium.com
Fish Tanks Direct

Product Details

Specifications

Details
Aquarium Capacity 16 US Gal (60 L)
Wattage 10 W
Lumens 1272 lm
Color Temp. 7000 K
LEDs 31

Reviews From Real Customers

Kat Ba
Livingthedream
Marieblu

9. API Aquarium Start Up Pack

API Aquarium Start Up Pack

  • 1 oz

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Amazon.com
eBay
Walmart
Chewy.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 4.88 x 1.19 x 6.38 inches; 3.2 Ounces
Country of Origin USA
Item Package Dimensions L x W x H 6.3 x 4.84 x 0.83 inches
Item Dimensions LxWxH 4.88 x 1.19 x 6.38 inches

Reviews From Real Customers

RRRR
fairydustxo
Mrsplew999

10. Melafix Marine (16 oz)

Melafix Marine (16 oz)

  • 16 oz

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Amazon.com
eBay
Walmart
PetSmart

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 1 x 1 x 5 inches; 6.4 Ounces
Country of Origin USA
Item Package Dimensions L x W x H 8.54 x 2.28 x 2.24 inches
Item Dimensions LxWxH 1 x 1 x 5 inches

Reviews From Real Customers

BarbieDz86
scretiree47
133imt

11. Marina LED Aquarium Kit 20 Gallon

Marina LED Aquarium Kit 20 Gallon

  • 68-litre glass aquarium
  • Stylish glass aquarium and canopy
  • Long-lasting, natural daylight effect LED lighting module incorporated into aquarium canopy
  • Quick change filter system with Marina ‘i’ series filter
  • Convenient easy feeding access

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Sold By Price
Amazon.com
eBay
Chewy.com
JoshsFrogs.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 24 x 12.5 x 16.5 inches; 35 Pounds
Country of Origin China
Item Package Dimensions L x W x H 29.9 x 22 x 18.5 inches
Target Audience Keyword Fish

Reviews From Real Customers

JustAFishServant

12. Tetra Aquarium Kit, 55-gal

Tetra Aquarium Kit, 55-gal

  • Dimensions (Overall): 50.62 inches (L), 14.87 inches (H) x 23.12 inches (W)
  • Weight: 78.78 pounds
  • Capacity (Volume): 7040 ounces
  • Intended Pet Type: Fish
  • Material: Glass

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Sold By Price
Amazon.com
eBay

Product Details

Specifications

Details
Product Dimensions 51.9 x 24.4 x 16.4 inches; 79 Pounds
Country of Origin USA
Item Package Dimensions L x W x H 52.3 x 24.5 x 17.2 inches
Target Audience Keyword Fish
Directions See label

Reviews From Real Customers

brad
bcarran

13. Instant Ocean Sea Salt (200 gal)

Instant Ocean Sea Salt (200 gal)

  • Synthetic sea salt contains every necessary major, minor, and trace element needed for an aquarium
  • Developed through sophisticated biological and chemical testing
  • Nitrate and phosphate free
  • Every batch is analyzed to assure consistent high quality
  • Made in the usa

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Amazon.com
Walmart
Chewy.com
Petco.com

Product Details

Specifications

Details
Instant Ocean Sea Salt 200 Gal.

Reviews From Real Customers

DJ Bear

14. Clear for Life20R 20-Gallon Rectangle Aquarium – Black

Clear for Life20R 20-Gallon Rectangle Aquarium - Black

  • 20 Gallon

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Amazon
Dog.com
1800PetSupplies
KV Supply

Product Details

Specifications

Details
Background Color Clear

Reviews From Real Customers

Roscoe

15. Nuvo Fusion 20 Pro – AIO 20 Gallon Aquarium Kit – Innovative Marine

Nuvo Fusion 20 Pro - AIO 20 Gallon Aquarium Kit - Innovative Marine

  • 20 Gallon

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Amazon
eBay
Innovative Marine
Pets Warehouse

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Target Audience Keyword Fish
Specific Uses for Product Indoor
Style Modern

Reviews From Real Customers

Meh

16. Innovative Marine Nuvo Fusion Lagoon 50 Pro AIO Aquarium Kit 50gal

Innovative Marine Nuvo Fusion Lagoon 50 Pro AIO Aquarium Kit 50gal

  • 50 Gallons Tank Dimensions
  • 29.92″ L x 23.62″ W x 16.14″ H Glass Thickness
  • 10mm Return Type
  • Dual Directional Flow Nozzles Return Pump Flow Rate
  • 538 GPH Return Pump Power Consumption

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Amazon
Innovative Marine
SaltwaterAquarium.com
Fish Tank USA

Product Details

Specifications

Details
Crated Package Weight 136 lbs.
Glass Thickness 10mm
Stand Package Weight 96 lbs.

17. Wholesale 100 Gallon Aquarium – Red & Gold

Wholesale 100 Gallon Aquarium - Red & Gold

  • 100 Gallon

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Amazon
Aquadream
AquadreamWholesale

Product Details

Specifications

Details
Water Actual Capacity 86 Gallons
Glass thickness 0.47 inches
Water Capacity 14 Gallons

18. Coralife 32 Gallon LED BioCube Aquarium

Coralife 32 Gallon LED BioCube Aquarium

  • Sleek modern hood with vibrant LED lighting
  • Integrated 24-hour timer with three independent channels
  • Compact and customizable filtration chamber
  • Quiet submersible pump, dual intakes and adjustable return nozzle

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Amazon
eBay
Petco.com
SaltwaterAquarium.com

Product Details

Specifications

Details
Primary Brand Coralife
Volume 32 GAL
Length 22 IN

Reviews From Real Customers

person
aerithgastgainsborough
Enuffznuff22

19. Worldwide Imports AWW84130 Live Nutri Seawater, 4.4-Gallon

Worldwide Imports AWW84130 Live Nutri Seawater, 4.4-Gallon

  • Replenish your aquarium with this natural seawater
  • Contains live bacteria that helps create an inorganic balance
  • Synthetic salt mix helps maintain the pH balance of the water

Check Latest Price

Sold By Price
Amazon
Chewy.com
Premium Aquatics
Petco.com

Product Details

Specifications

Details
Product Form Liquid
Container Type Bottle
Volume 4.4 gallons

Reviews From Real Customers

Trav21
skeete1
oceandude

20. Cube 20 Nano AIO Aquarium – Waterbox | Waterbox Aquariums

Cube 20 Nano AIO Aquarium - Waterbox | Waterbox Aquariums

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Amazon
Waterbox USA
BulkReefSupply.com

Product Details

Specifications

Details
Dimensions 17.7″L x 17.7″W x 15.7″H
Glass Thickness 6mm (1/4″)
Water Height 15.2″
Aquarium Volume 20 Gallons
Aquarium Dry Weight 43 lbs

Reviews From Real Customers

Trevor H.
Madmartigan
Liane

Conclusion

A 20 gallon tank is the perfect size for a saltwater fish tank. You can keep a wide variety of fish in a 20 gallon tank, and they will have plenty of room to swim and explore.

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