Randall’s Anthias

Randall's Anthias
Latin name:
(Pseudanthias randalli)

Care Level





Pink, Red, Yellow



Preferred Conditions

sg 1.020-1.025, 72-78° F, dKH 8-12, pH 8.1-8.4

Avg. Max Size


Minimum Tank Size


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Are you looking to add a splash of color and activity to your marine aquarium? Look no further than Randall’s Anthias (Pseudanthias randalli). These vibrant and energetic fish are a popular choice among aquarists due to their stunning appearance and relatively easy care requirements.

Randall’s Anthias: An Overview

Randall’s Anthias is a small, schooling fish that originates from the Indo-Pacific region. They typically grow to a length of around 3 inches and exhibit a striking coloration that includes a bright red body with blue stripes and yellow markings. These fish are known for their lively behavior and are often seen swimming in groups throughout the aquarium.


  • Size: Typically reaches a length of around 3 inches.
  • Coloration: Vibrant red body with blue stripes and yellow markings.
  • Behavior: Lively and active, often seen swimming in groups.
  • Lifespan: Can live for up to 5 years in captivity with proper care.

Care and Maintenance

Providing proper care for Randall’s Anthias is essential for their long-term health and well-being. Here are some key considerations to keep in mind:

Aquarium Size

Randall’s Anthias require a minimum tank size of 30 gallons, although a larger tank is recommended to provide them with ample swimming space. The aquarium should also have a tight-fitting lid, as these fish are known to be jumpers.

Water Parameters

  • Temperature: 72-78°F (22-26°C)
  • pH: 8.1-8.4
  • Salinity: 1.020-1.025

Regular water changes are crucial to maintain water quality and prevent the buildup of harmful toxins. Aim to change approximately 10-15% of the tank water every two weeks.

Filtration and Lighting

A powerful filtration system is essential for maintaining a clean and healthy environment for Randall’s Anthias. Choose a filter that is rated for a tank size larger than your actual tank to ensure efficient filtration. Additionally, provide moderate lighting to mimic their natural habitat.


Randall’s Anthias are carnivorous and require a diet rich in live or frozen foods. Offer a variety of foods such as brine shrimp, mysis shrimp, and chopped seafood. Feed them several times a day, but avoid overfeeding to prevent water quality issues.


Randall’s Anthias are generally peaceful fish and can be kept with other peaceful species. However, they can be aggressive towards smaller fish, so it’s best to avoid housing them with species that are significantly smaller in size.

Good tankmates for Randall’s Anthias include:

  • Firefish
  • Gobies
  • Wrasses
  • Damselfish


Breeding Randall’s Anthias in captivity is challenging and requires a specialized setup. It is generally not recommended for beginner aquarists.


Randall’s Anthias are a beautiful and active addition to any marine aquarium. With proper care and maintenance, these fish can thrive and bring years of enjoyment to aquarists of all levels. Whether you’re a seasoned aquarist or just starting out, Randall’s Anthias are sure to captivate you with their vibrant colors and lively behavior.


  1. Q: What is the minimum tank size for Randall’s Anthias?
    A: A minimum tank size of 30 gallons is recommended, although a larger tank is preferred.
  2. Q: What are the ideal water parameters for Randall’s Anthias?
    A: Temperature: 72-78°F (22-26°C), pH: 8.1-8.4, Salinity: 1.020-1.025.
  3. Q: What is the best diet for Randall’s Anthias?
    A: A diet rich in live or frozen foods such as brine shrimp, mysis shrimp, and chopped seafood.