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20 Best Saltwater Fish For 40 Gallon Tank (2022 Updated)

A 40 gallon tank is big enough to house a fair number of saltwater fish, but the exact number and type of fish will depend on the specific dimensions of the tank and the filtration system that is in place.

Some saltwater fish that could potentially be housed in a 40 gallon tank include clownfish, damselfish, gobies, wrasses, and certain species of tangs and angels. It is important to do thorough research on the specific needs of each type of fish before adding them to the tank to ensure that they will be able to thrive in the environment.

20 Best Saltwater Fish For 40 Gallon Tank

1. 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.

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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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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

3. LED BioCube 16 Aquarium Kit – Coralife 100530106

LED BioCube 16 Aquarium Kit - Coralife 100530106

  • Peak PAR 61
  • Peak LUX 3510
  • Hinge-top canopy design
  • Quiet submersible pump, dual intakes and adjustable return nozzle
  • Clear glass back panel for easy refugium set-up

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Specifications

Details
Product Dimensions 16.75 x 15 x 17.5 inches
Is Discontinued By Manufacturer No
Country of Origin China
Shape Square
Style Marine or Freshwater Aquarium Kit

4. biOrb Classic 15 Aquarium with Standard Light -4 Gallon ,Black

biOrb Classic 15 Aquarium with Standard Light -4 Gallon ,Black

  • Everything you need to start your new hobby is included Acrylic aquarium
  • The standard white LED lighting will give your biOrb a classic ambiance. The lighting has an easy on and off switch. 5-step Filtration
  • Ensures clear healthy water with biological mechanical and chemical filtration water stabilization and oxygenation Filter Cartridge
  • All biOrb aquariums operate from a 12V universal transformer Quiet Air Pump
  • Pump is designed for quiet operation and stability Easy Feeding Access

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Target

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Specifications

Details
Product Dimensions 11.75 x 11.75 x 12.5 inches; 4.84 Pounds
Country of Origin China
Item Package Dimensions L x W x H 15 x 14.8 x 13.54 inches
Target Audience Keyword Fish
Age Range Description All Life Stages

5. Radius 5 Gallon Glass Aquarium Kit – Penn-Plax

Radius 5 Gallon Glass Aquarium Kit - Penn-Plax

  • 5 Gallon

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Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 8 x 14 x 11 inches; 10.6 Pounds
Country of Origin China
Item Package Dimensions L x W x H 17.5 x 15 x 12.5 inches
Target Audience Keyword Fish

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cdw202x
STGale

6. Marineland Portrait Glass 5 Gallon LED Aquarium Kit

Marineland Portrait Glass 5 Gallon LED Aquarium Kit

  • Advanced 3-stage hidden back panel filtration with adjustable flow filter pump.
  • The white LEDs create a shimmering light in the water.
  • The blue LEDs produce a relaxing moonlight glow.
  • Includes a hinged light and sliding glass canopy for easy access to tank.

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Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 9.5 x 9.5 x 14 inches; 12 Pounds
Item Package Dimensions L x W x H 17.4 x 12.6 x 11.9 inches
Target Audience Keyword Fish
Directions See label for details

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chloe

7. SeaClear 46 Gallon Bowfront Aquarium Combo, Clear

SeaClear 46 Gallon Bowfront Aquarium Combo, Clear

  • Convex shape enhances the view; You won’t believe how your fish and decorations will pop!
  • 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. Fixture is compatible with any T8 or T12 24inch fluorescent tube.

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Specifications

Details
Product Dimensions 36 x 16.5 x 20 inches; 20 Pounds
Item Package Dimensions L x W x H 38.9 x 25.1 x 18.4 inches
Target Audience Keyword Fish
Shape Rectangular
Style 46 gal Bowfront

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AnythingBEER
Oregonbeastgirl

8. biOrb Classic 60 Aquarium with MCR Light – 16 Gallon ,Silver

biOrb Classic 60 Aquarium with MCR Light - 16 Gallon ,Silver

  • BiOrb Classic 60 Litre Silver Aquarium with Multi Colour LED Remote
  • It is a large and generously sized acrylic aquarium that includes everything you need to get setup in no time
  • Complete kit with filter and LED lights
  • Modern and stylish design

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Specifications

Details
Product Dimensions 19.75 x 19.75 x 20.5 inches; 15.35 Pounds
Country of Origin China
Item Package Dimensions L x W x H 21.75 x 20.5 x 20.1 inches
Target Audience Keyword Fish
Age Range Description All Life Stages

9. Clear for Life 40R 40-Gallon Rectangle Aquarium – Black

Clear for Life 40R 40-Gallon Rectangle Aquarium - Black

  • 40 Gallon

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1800PetSupplies
Dog.com
KV Supply

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Details
Background Color Black

10. Nuvo Fusion Pro 40 Aquarium – Midsize

Nuvo Fusion Pro 40 Aquarium - Midsize

  • 2 40 Gallon

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Details
Tank Package Weight 83 lbs.
Glass Thickness 8mm

11. Wholesale 40 Gallon Aquarium – Black

Wholesale 40 Gallon Aquarium - Black

  • 40 Gallon

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Aquadream
AquadreamWholesale

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Specifications

Details
Water Actual Capacity 36 Gallons
Glass thickness 0.47 inches
Water Capacity 4 Gallons

12. Fluval Flex 34L 9 Gallon Nano Glass Aquarium Kit

Fluval Flex 34L 9 Gallon Nano Glass Aquarium Kit

  • Dimensions: 14″ W x 13″ D x 13″ H

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Specifications

Details
Product Type Aquarium
Package Content Remote control, transformer
Intended For Fishes
Features 7W, 7500K LED (36 white + 3 RGB, 1900 lm), 3-stage filtration, hidden rear filter compartment, honeycomb wrap, easy feed top cover, 230 L/h pump output
Aquarium
Type Reef
Shape Bold curved front
Water Type Fresh
Components LED light, circulation pump with output nozzle, foam filter block with handle, activated carbon insert, BioMax insert, undertank pad
Volume 9 gal
Miscellaneous
Color Black
Product Material Glass
Package Type Box
Warranty 2 years
Dimensions & Weight
Width 13 in
Height 13 in
Length 1 ft

13. SeaClear System II Acrylic Aquarium

SeaClear System II Acrylic Aquarium

  • 50 Gallon

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14. Aqueon 40 Gal Breeder Standard Aquarium Tank, Black Trim

Aqueon 40 Gal Breeder Standard Aquarium Tank, Black Trim

  • 40 Gallon

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Dons Pets

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Specifications

Details
Manufacturer Part Number 015905100403
Product Name Aquarium
Product Type Aquarium
Tank Capacity 40 gal
Shape Rectangle

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Cold Water Diver
Cody88221
nessajon

15. 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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Specifications

Details
Primary Brand Coralife
Volume 32 GAL
Length 22 IN

16. 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

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Details
Product Form Liquid
Container Type Bottle
Volume 4.4 gallons

17. Red Sea Reefer 170 – Black

Red Sea Reefer 170 - Black

  • Rimless, ultra-clear, beveled edge glass aquarium
  • Elegant marine-spec cabinet
  • Professional sump with constant height skimmer chamber and micron filter bags
  • Silent, regulated down-flow system with emergency overflow
  • Integrated automatic top-up system with reservoir

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Specifications

Details
Aquarium Dimensions 24″L x 20″W x 20″H
Stand Dimensions 24″L x 20″W x 30″H
Tank Capacity 33 Gallons
Capacity 10 Gallons
Front Glass Thickness 3/8″

18. Red Sea Reefer Peninsula 500 Black

Red Sea Reefer Peninsula 500 Black

  • 25mm Main Drain.
  • 32mm Emergency Drain.
  • 25mm Note: All Red Sea Reefer Aquariums include a black interior finish, regardless of the exterior finish. Return pump not included.

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Specifications

Details
Ultra clear front glass thickness (mm) 15 (5/8′′)
In cabinet sump water volume (L) 102 (27 gal)
Total system water volume (L) 500 (132 gal)
RO reservoir volume (L) 22.5 (6 gal)
Display tank height (cm) 60 (23.6′′)

19. Aqcult 306144 43 gal Red Sea Reefer 170 Deluxe Aquarium, Black

Aqcult 306144 43 gal Red Sea Reefer 170 Deluxe Aquarium, Black

  • 43 gal

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Specifications

Details
Main Features Ultra clear front and side glass
System Volumes Display tank water volume (L)
System Dimensions Display tank length (cm)
Sump Dimensions Water height (cm)

20. Reef 130.4 Black

Reef 130.4 Black

  • Side to Side (Size: 20.5″ H x 18″ W x 18″ D): 18 Overall Width.
  • Side to Side (Size: 20.5″ H x 24″ W x 24″ D): 24 Overall Width.
  • Side to Side (Size: 20.5″ H x 36″ W x 24″ D): 36 Overall Width.
  • Side to Side (Size: 20.5″ H x 48″ W x 24″ D): 48 Overall Depth.
  • Front to Back (Size: 20.5″ H x 18″ W x 18″ D): 18 Overall Depth.

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Product Details

Specifications

Details
Dimensions (LxWxH) 1200 x 600 x 550mm (47.2″ × 23.6″ × 21.7″)
Display Volume 364 L/96.3 gals
Total Volume 480 L/126.9 gals
Glass Thickness 12mm

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Kyle R.
Toban R.

Conclusion

The most important factor when stocking a 40 gallon tank with saltwater fish is compatibility. Some fish are very territorial and can become aggressive toward fish that are similar in size or shape. It is important to do research on the fish you are interested in and make sure they are compatible with the other fish in your tank.

Another important factor to consider is the size of your fish. Some saltwater fish can grow to be quite large and will need a lot of room to swim. It is important to make sure your tank is large enough to accommodate the fish you are interested in.

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