Yellow Belly Blue Hippo Tang

Yellow Belly Blue Hippo Tang (Paracanthurus hepatus "Yellow Belly")

Common Names

• Yellow Belly Blue Hippo Tang
• Yellow Belly Regal Tang
• Yellow Belly Palette Surgeonfish
• Yellow Belly Blue Tang
• Pacific Blue Tang

 

Identification

The Yellow Belly Blue Hippo Tang is a stunning color variant of the classic Blue Hippo Tang, distinguished by its vibrant golden-yellow underside rather than the white or pale grey belly seen on standard specimens. It features an electric royal blue body with bold black markings resembling an artist's palette and a bright yellow caudal fin. Native to the Indo-Pacific, this variety is highly sought after by reef hobbyists due to its richer coloration and rarity.

 

Approximate Size: 2–10 inches (5–25 cm)

Behavior & Role in a Reef Tank

Yellow Belly Blue Hippo Tangs are active, constantly swimming fish that require plenty of open swimming space. They spend much of the day grazing on algae growing on live rock while also exploring every corner of the aquarium.

Although generally peaceful, they can become territorial toward other tangs, particularly those with a similar body shape or coloration. When housed in appropriately sized aquariums with plenty of rockwork, they make exceptional centerpiece fish and are ideal additions to large reef systems.

Their continuous grazing behavior also helps reduce nuisance algae, making them both beautiful and beneficial.

 

Compatibility & Caution

The Yellow Belly Blue Hippo Tang is considered reef safe and can be kept with most reef-compatible fish, corals, shrimp, snails, crabs, and other invertebrates.

Due to their active swimming habits, they require a minimum aquarium size of 180 gallons for long-term health. Juveniles may begin in slightly smaller aquariums but will quickly outgrow them.

Like many surgeonfish, they possess a sharp defensive scalpel at the base of their tail, which can be used when threatened or during territorial disputes.

They are also susceptible to marine parasites such as Marine Ich and Velvet, making excellent water quality, stable parameters, and quarantine highly recommended.

 

Care Level

Care Level: Moderate

Recommended Water Parameters

• Temperature: 74–80°F (23–27°C)
• Specific Gravity: 1.024–1.026
• pH: 8.1–8.4
• Alkalinity: 8–12 dKH
• Ammonia/Nitrite: 0 ppm
• Nitrate: <20 ppm (preferably under 10 ppm)

 

Diet

Yellow Belly Blue Hippo Tangs are omnivores with a strong preference for marine algae. A varied diet promotes vibrant coloration, strong immune function, and long-term health.

Offer:

• Marine algae and nori sheets
• Spirulina-based pellets and flakes
• High-quality herbivore pellets
• Mysis shrimp
• Brine shrimp
• Chopped seafood
• Frozen herbivore blends

Feed 2–3 small meals daily, with frequent access to algae-based foods for natural grazing.

 

Tank Mates

Excellent companions include:

• Clownfish
• Fairy and Flasher Wrasses
• Gobies
• Blennies
• Cardinalfish
• Anthias
• Angelfish (reef-safe species)
• Foxface Rabbitfish
• Chromis
• Reef-safe Butterflyfish
• Most peaceful reef fish

Can also be housed with other tangs in larger aquariums when introduced carefully and provided with ample swimming space.

Avoid aggressive triggers, large predatory groupers, lionfish, or overly territorial surgeonfish in undersized aquariums.

 

Fun Fact

The Yellow Belly Blue Hippo Tang is one of the most desirable variants of the famous "Dory" fish. Its naturally occurring golden-yellow belly is found primarily in regions of the Indian Ocean, making it considerably rarer and more valuable than the standard Blue Hippo Tang. Given proper care, these beautiful surgeonfish can live 20 years or more, becoming a long-term showpiece in large reef aquariums.