Saltwater Fish
Bicolor Dottyback

Species Description…

Scientific Name: Pseudochromis paccagnellae
Common Name: Bicolor Dottyback
Species Group: Dottyback
Habitat: Reef Safe
Care Level: Beginner
Temperament: Aggressive
Diet Type: Carnivore
Role in Aquarium: Community Fish
Max Fish Length: 3 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific, including Indonesia and the Philippines
Pseudochromis paccagnellae - Bicolor Dottyback

Pseudochromis paccagnellae (Bicolor Dottyback)

Overview

  • Native to the Indo-Pacific region, commonly found inhabiting coral reefs and rocky crevices.
  • Distinctive two-tone coloration with a vibrant purple front half and bright yellow rear half.
  • Popular aquarium species for its bright colors, active nature, and relatively hardy constitution.
  • Known for bold, territorial behavior, suitable for intermediate marine aquarists.

Feeding

  • Carnivorous; naturally feeds on small crustaceans, worms, and zooplankton.
  • Accepts varied aquarium foods including mysis shrimp, brine shrimp, finely chopped seafood, and high-quality marine pellets or flakes.
  • Multiple daily feedings recommended for optimal health and coloration.
  • Variety in diet essential for nutritional balance and overall health.

Habitat

  • Suitable for smaller aquariums (minimum 30 gallons) with ample hiding places and extensive live rock structures.
  • Requires a mature, stable aquarium environment with consistent water conditions.
  • Provide numerous caves, crevices, and hiding spots to reduce aggression and stress.
  • Moderate water flow and efficient filtration necessary for ideal 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 changes; regular water testing and routine maintenance required.
  • Monitor for marine diseases and parasites; early detection and treatment are key.

Compatibility

  • Semi-aggressive; best housed with robust, similarly-sized fish.
  • May exhibit territorial behavior, particularly towards other dottybacks or similarly shaped fish.
  • Generally reef-safe but may prey on small shrimp and invertebrates.
  • Recommended tank mates include larger clownfish, dwarf angelfish, tangs, and other semi-aggressive fish species.

Aquarium Behavior

  • Bold, active swimmers often seen exploring caves and rock formations.
  • Displays territorial aggression, especially in smaller aquariums; ample hiding spaces help reduce conflicts.
  • Generally solitary; best kept singly unless provided with a larger aquarium setup.
  • Interactive, inquisitive behavior; engages actively with aquarium caretakers during feeding.