We’re covering the top five centerpiece fish for a 55-gallon aquarium. The 55-gallon tank is a versatile and popular choice for many aquarists.  These tanks are 4 feet long, 12 ½ inches wide, and about 21–22 inches deep.

It’s an interesting size because it’s fairly narrow, which can affect your choice of fish. Some fish might not look great in a tank this narrow. That’s why I think we’ve picked five species that will go really well in your 55-gallon tank. You’ll find additional details and species profiles.

#5: Guanabara (Guianacara stergiosi)

Suggested Image: Guianacara stergiosi swimming in an aquarium

In my opinion, the Guianacara is a fantastic choice for a 55-gallon aquarium.

We currently keep Guanacara stergiosi in a 33-gallon long tank, which shares similar dimensions with a 55-gallon tank but is shorter in height.

Guanacaste are fascinating fish with unique characteristics.

• Temperament: They are not very aggressive, making them great for community tanks.
• Appearance: These fish have fascinating colors with a shimmering, iridescent look.
• Size: They max out at around 4½ to 5 inches.
• Fins: Their fins develop beautifully as they mature.
• Behavior: Guanacaras have a calm and laid-back personality, compatible with most community fish.

Potential Downsides:

• They may occasionally dig small pits, especially when breeding.
• If they start breeding in a community aquarium, they might become territorial.
• Guanacaste are somewhat rare in pet stores and can be expensive when found online.

#4: Pearl Gourami (Trichopodus leerii)

Suggested Image: Pearl Gourami showing its shimmer

Pearl gouramis are a popular choice for their beauty and temperament.

Why Pearl Gouramis are Great:

• Temperament: They are peaceful and ideal for a relaxing, non-aggressive community tank.
• Color: Their shimmering patterns are absolutely stunning.
• Size: They grow to about 4 inches, which is perfect for a centerpiece fish in a 55-gallon tank.
• Compatibility: You can keep multiple pearl gouramis together.

Considerations:

• They are not highly active fish, which can be relaxing or dull, depending on your preference.
• Avoid keeping them with other gourami species, as mixing them isn’t recommended.

#3: Electric Blue Acara (Andinoacara pulcher)

Suggested Image: Electric Blue Acara in a planted aquarium

Electric Blue Acara are stunning fish, full of vibrant colors.

Why They’re Awesome:

• Color: These fish are among the most colorful on this list.
• Size: They reach 5–6 inches and have a thicker body compared to other species.
• Activity: They’re more active than other fish on this list, without being overly energetic.
• Availability: Their popularity is increasing, making them easier to find and more affordable.

Potential Downsides:

• They may nibble on plants.
• Like other cichlids, they may become aggressive when breeding.

#2: Angelfish (Pterophyllum scalare)

Suggested Image: A pair of angelfish showcasing their tall fins

Angelfish are a timeless favorite among aquarium enthusiasts. They are a classic choice for aquarium enthusiasts.

Why Angelfish are Great for a 55-Gallon Tank:

• Unique Shape: Their tall bodies (up to 12 inches) make them a striking centerpiece.
• Variety: Angelfish come in a range of colors and fin types.
• Lifespan: They can live 8–10 years, making them a long-term companion.
• Graceful Behavior: Their peaceful and relaxing movement makes them a joy to watch.

Considerations:

• Breeding pairs can become territorial.
• Multiple males may fight.
• Avoid fin-nipping species, as angelfish fins are vulnerable to damage.

#1: Geophagus Tapajos (Geophagus sp. “Tapajos”)

Suggested Image: Geophagus Tapajos displaying vibrant colors

Geophagus Tapajos ranks as our top choice for centerpiece fish.

Why They’re the Best:

• Size: They max out at around 5 inches, making them ideal for a 55-gallon tank.
• Color: Both males and females display striking colors. Males have more elaborate fins.
• Personality: They’re peaceful and have incredible personalities.
• Rarity: These fish stand out due to their unique appearance and behavior.

Considerations:

• Breeding pairs may become slightly aggressive.
• Multiple males may spar; use decorations to create line-of-sight breaks.
• Cost and availability can be challenges. They are among the more expensive fish on this list and not as commonly found in pet stores.

Final Thoughts
We’d love to hear from you! Let us know in the comments section below which centerpiece fish you’ve kept in your 55-gallon aquarium.

Check the species profiles linked below for more detailed information. Thanks for reading