Introduction to Saltwater Anthias

Anthias are vibrant, mid-water schooling fish that bring movement and color to reef aquariums. Found in tropical reefs across the Indo-Pacific, these fish thrive in large, well-oxygenated tanks with plenty of open swimming space. Anthias are known for their social structure, with groups typically consisting of a dominant male and multiple females. Given proper care, they are peaceful, reef-safe, and active additions to community tanks.

Care Requirements

Care Level: Moderate to Difficult Minimum Tank Size: 75 – 150+ gallons Smaller species (e.g., Dispar, Bartlett’s) – 75+ gallons Larger species (e.g., Lyretail, Sunburst) – 125+ gallons Aquarium Setup: Requires open swimming space, high water flow, and plenty of hiding spots in rockwork to support natural schooling behavior.

Diet & Nutrition

Diet: Carnivorous – Requires frequent feedings due to their high metabolism

Recommended Foods:

Small frozen foods (mysis shrimp, brine shrimp, plankton) High-quality marine pellets and flakes Enriched frozen or live copepods for variety Anthias should be fed at least 2-3 times per day to maintain their energy levels and vibrant coloration. An automatic feeder can help ensure consistent feedings.

Lifespan & Growth Rate

Lifespan: 5-10+ years Growth Rate: Moderate – Can reach adult size within 1-2 years Anthias require a stable, well-maintained environment to reach their full lifespan. Frequent small feedings and low stress levels contribute significantly to their health.

Temperament & Compatibility

Temperament: Peaceful to Semi-Aggressive – Best kept in groups with a dominant male and multiple females Reef Safe? Yes – Safe for corals and invertebrates Anthias are social fish that thrive in small groups. If kept singly, they may become stressed and less active. Introducing them in groups and providing adequate space helps reduce aggression among individuals.

Common Challenges & Considerations

High Metabolism: Requires multiple small feedings per day to stay healthy. Sexual Transition: Anthias are protogynous hermaphrodites, meaning the dominant female will transition into a male if no male is present. Shy Behavior: Can be timid when first introduced—placing them with peaceful tankmates helps them settle in. Oxygenation Needs: Prefers strong water movement and well-oxygenated tanks, making a good skimmer and powerheads essential. Water Conditions Temperature: 74-80°F dKH (Alkalinity): 8-12 pH: 8.1-8.4 Specific Gravity: 1.020-1.025 Stable oxygen levels and water movement are crucial for their long-term health.

Color Varieties & Popular Species

Anthias are available in a variety of bright colors, with many species displaying sexual dimorphism, where males and females have distinct color patterns. Some of the most popular species include: Lyretail Anthias (Pseudanthias squamipinnis) – Bright orange/red females, deep purple/yellow males Bartlett’s Anthias (Pseudanthias bartlettorum) – Vibrant yellow and pink, active swimmers Dispar Anthias (Pseudanthias dispar) – Small, reddish-pink body with orange highlights Sunburst Anthias (Serranocirrhitus latus) – More solitary, deep golden-orange coloration

Anthias

Borbonius Anthias - Odontanthias borbonius

Pink Square Anthias - Male- Pseudanthias pleurotaenia

Borbonius (Blotchy) Anthias

Borbonius (Blotchy) Anthias