Saltwater Fish
Jewel Damselfish

Species Description…

Scientific Name: Plectroglyphidodon lacrymatus
Common Name: Jewel Damselfish
Species Group: Damselfish
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Aggressive
Diet Type: Omnivore
Role in Aquarium: Community Fish
Max Fish Length: 4 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific
Plectroglyphidodon lacrymatus - Jewel Damselfish

Plectroglyphidodon lacrymatus (Jewel Damselfish)

Overview

  • Found in the Indo-Pacific region, especially around coral reefs, lagoons, and reef flats.
  • Displays an iridescent blue body with jewel-like spots, which become more pronounced under reef lighting.
  • Territorial and bold, especially as it matures, making it better suited for more experienced aquarists.
  • Very hardy and adaptable, making it a good choice for well-planned community or species tanks.

Feeding

  • Omnivorous; feeds on algae, plankton, and small invertebrates in the wild.
  • Will accept a wide variety of foods, including flakes, pellets, frozen mysis shrimp, and spirulina-based diets.
  • Feed 1–2 times daily with a mix of plant and protein-based foods to ensure health and coloration.
  • Occasional supplementation with seaweed or algae sheets is beneficial.

Habitat

  • Suitable for aquariums of at least 30 gallons, with plenty of live rock for hiding and territory marking.
  • Prefers reef environments with stable parameters and moderate water movement.
  • Provide caves and rock crevices to reduce stress and territorial aggression.
  • Good water quality and routine maintenance are essential for health and behavior.

Fish Care

  • Temperature: 74–80°F (23–27°C).
  • pH: 8.1–8.4; Specific Gravity: 1.020–1.025.
  • Very hardy but may become aggressive if stressed or crowded.
  • Routine water changes and observation help maintain long-term health.

Compatibility

  • Semi-aggressive; may be territorial toward other damselfish and smaller or passive species.
  • Reef-safe; does not typically harm corals or invertebrates.
  • Best housed with similarly robust species such as clownfish, dottybacks, and dwarf angelfish.
  • Avoid mixing with timid or slow-moving tank mates in small aquariums.

Aquarium Behavior

  • Active and territorial, often claiming a section of the tank as its own.
  • More aggressive behavior may emerge as the fish matures.
  • Will interact with tank mates and caretakers, especially during feeding time.
  • Providing visual barriers and hiding spots helps reduce aggression and stress.