Saltwater Fish
Chrysiptera parasema
Chrysiptera parasema
(Yellowtail Blue Damselfish)

Species Description…

Scientific Name: Chrysiptera parasema
Common Name: Yellowtail Blue Damselfish
Species Group: Damselfish
Habitat: Reef Safe
Care Level: Beginner
Temperament: Semi-aggressive
Diet Type: Omnivore
Role in Aquarium: Community Fish
Max Fish Length: 3 (inches)
Min Aquarium Size: 20 (gallons)
Native Range: Western Pacific, including Indonesia, the Philippines, and the Great Barrier Reef
Chrysiptera Parasema - The Yellowtail Blue Damselfish

Chrysiptera Parasema (The Yellowtail Blue Damselfish)

Overview

  • Native to the Indo-Pacific, commonly found in shallow coral reefs and rocky coastal areas.
  • Easily recognized by its vibrant blue body and striking yellow tail.
  • A hardy and adaptable species, making it a popular choice for beginner and experienced aquarists alike.
  • Typically observed swimming near coral formations or darting in and out of rock crevices.
  • Best suited for well-maintained aquariums with live rock, stable water conditions, and a peaceful community setup.

Feeding

  • Omnivorous, feeding on plankton, algae, and small invertebrates in the wild.
  • Requires a varied diet of high-quality marine flakes, frozen mysis shrimp, and vitamin-enriched brine shrimp.
  • Readily accepts prepared foods and benefits from occasional live food offerings.
  • Should be fed multiple small meals per day to maintain energy levels and support overall health.
  • A nutrient-rich diet ensures optimal coloration and long-term vitality.

Habitat

  • Prefers coral-rich reef environments with moderate water movement.
  • Frequently seen near coral heads and rocky structures, using them for shelter and protection.
  • Aquarium setups should include live rock to provide hiding spots and encourage natural behaviors.
  • Requires high-quality filtration and stable water parameters to thrive.
  • Providing shaded areas along with open swimming space helps reduce stress.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) for maintaining health and activity.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires consistent water quality with routine maintenance and water changes.
  • Reef-safe and does not pose a threat to corals or invertebrates.
  • Providing live rock formations supports their territorial nature and reduces stress.

Compatibility

  • Generally peaceful but may become territorial in smaller tanks.
  • Compatible with clownfish, tangs, wrasses, and other small to medium-sized reef fish.
  • Best kept in small groups or pairs to reduce aggression.
  • Should not be housed with overly aggressive fish that may bully them.
  • Providing sufficient space and rock structures minimizes territorial disputes.

Aquarium Behavior

  • An active and inquisitive species that enjoys darting between corals and rocks.
  • Frequently observed defending its territory from other fish.
  • More confident when provided with plenty of hiding spots.
  • Providing a structured reef environment encourages natural exploration and interaction.
  • Over time, it may become accustomed to its caretaker and respond actively during feeding sessions.