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Squareback Anthias
Squareback Anthias
Origin
Indo-Pacific
Habitat Size
50-150 Liters
Water Type
Salt Water
Water Temperature
22º-26ºC
Cost in India
₹80 - ₹150
Size
3 - 7 inches (Small)
Diet
Carnivore
by Happy Pet TeamUpdated on 29 Oct 2025
Introduction to Squareback Anthias
Squareback Anthias is scientifically called Pseudanthias pleurotaenia. The males of this species have a vibrant pinkish-orange with a distinctive pinkish-purple square on their backs, while females are yellow with purple accents. The fish is also known as Squarespot Anthias, Pink Square Anthias, Mirror Basslet, or Squarespot Fairy Basslet and is larger in size as compared to other Anthias.
Characteristics
Temperament
Aggressive
Friendly
Compatibility with other fishes
Not Friendly
Super Friendly
Habitat Size
Small
Large
Squareback Anthias Habitat Requirement
Initial Setup Cost
₹4,000 - ₹12,000
Water Temperature
22º -26ºC
Water Type
Salt Water
PH Level
8.1 - 8.4
Maintaining a healthy living condition is crucial to ensure the best Squareback Anthias care. Make sure to keep the minimum Squareback Anthias tank size for long health.
Essential Equipment
Aquarium tank
Water filter
Heater
Light
Substrate
Decor
Squareback Anthias Dietary Need
Avg Monthly Expenses
₹80 - ₹ 150
A healthy mix of food & supplements in the diet will ensure the fish remains healthy and full.
Health & Care of Squareback Anthias
Common Health Issues
White spot / ick
Velvet disease (yellowish-brown spots on the skin)
Bacterial infections
Parasites
Swim bladder disease
Fungal infections
Signs of good health
Active
Bright coloration
Good apetite
Undamaged fins
Signs of sickness
Loss of appetite
Lethargic behaviour
Dull coloring
White growths
Frequent hiding
Take good care of Squareback Anthais to ensure they live healthily and for long.
Prerequisites for a Fish
Adequate tank space
Cleanliness
Effort & commitment
Enriching Environment
Written by
Happy Pet TeamAuthor
Team Happy Pet is a passionate collective of pet experts, enthusiasts, and advocates dedicated to sharing trusted and insightful content.
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Frequently Asked Questions
Can I keep more than one male Squareback Anthias in a tank?
No. They are best kept with one male and multiple females. Multiple males often fight or one will dominate.
How often should Squareback Anthias be fed?
Multiple times per day in small portions because of their high metabolic rate.
Are Squareback Anthias reefs safe?
Yes. Generally reef safe with corals and invertebrates. They do best in reef setups with live rock, plenty of hiding spaces.
How can you identify a male Squareback Anthias?
A male Squareback Anthias is larger, brightly colored, and has the distinct purple-to-lavender square blotch on its side, which gives the species its name. Males also tend to display more vibrant pinkish-orange hues overall.
Can female Squareback Anthias turn into males?
Yes. Squareback Anthias are protogynous hermaphrodites, meaning a dominant female can transition into a male if the existing male is removed. This change is both behavioural and physical, including the appearance of the purple square patch.
Where can I find Squareback Anthias for sale?
Squareback Anthias are available at reputable aquarium retailers and trusted online marine fish stores.