Saltwater Fish
Diadem Dottyback

Species Description…

Scientific Name: Pseudochromis diadema
Common Name: Diadem Dottyback
Species Group: Dottyback
Habitat: Reef Safe
Care Level: Beginner
Temperament: Semi-aggressive
Diet Type: Carnivore
Role in Aquarium: Community Fish
Max Fish Length: 3 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific, including the Red Sea
Pseudochromis diadema - Diadem Dottyback

Pseudochromis diadema (Diadem Dottyback)

Overview

  • Native to the Indo-Pacific region, typically inhabiting coral reefs and rocky crevices.
  • Distinctive coloration featuring a vivid purple body with a yellow dorsal stripe running from head to tail.
  • Known for its bold and territorial nature, suitable for experienced marine hobbyists.
  • Popular for vibrant colors and active behavior, adding lively character to aquariums.

Feeding

  • Carnivorous diet; naturally feeds on small invertebrates and crustaceans.
  • Readily accepts a variety of aquarium foods including mysis shrimp, brine shrimp, chopped seafood, and high-quality marine pellets or flakes.
  • Multiple small feedings daily recommended for optimal health and vibrant coloration.
  • Ensuring dietary variety is essential for long-term nutritional health.

Habitat

  • Suitable for moderately sized aquariums (minimum 30 gallons) with ample hiding places and structured live rock formations.
  • Requires a stable, mature aquarium environment for long-term success.
  • Provide numerous caves, crevices, and hiding spots to replicate natural habitat and reduce aggression.
  • Moderate water flow and efficient filtration required for maintaining water quality.

Fish Care

  • Optimal water temperature: 72-78°F (22-26°C).
  • Recommended pH: 8.1-8.4; specific gravity: 1.020-1.025.
  • Generally hardy but sensitive to sudden water quality changes; regular water testing and maintenance necessary.
  • Monitor for signs of marine diseases and parasites; prompt treatment is important.

Compatibility

  • Semi-aggressive species best suited for robust tank mates of similar or larger size.
  • Reef-safe with caution; may prey on small ornamental shrimp or invertebrates.
  • Recommended companions include larger clownfish, dwarf angelfish, tangs, and other semi-aggressive marine fish.
  • Territorial, generally kept singly to avoid conflicts unless in larger aquariums.

Aquarium Behavior

  • Active and territorial, frequently exploring and defending its preferred hiding spots.
  • May show aggression towards similarly sized fish or other dottybacks.
  • Providing ample hiding spaces and territorial boundaries helps manage aggression.
  • Often engages actively with aquarium caretakers during feeding sessions.