Yellowtail Blue Damselfish Care Guide
Chrysiptera parasema · Saltwater Damselfish
What Yellowtail Blue Damselfish look like
The Yellowtail Blue Damselfish (Chrysiptera parasema) exhibits a vibrant blue body with a striking yellow tail, which serves as a distinguishing feature among its congeners. Adult specimens can reach a maximum size of approximately 3 inches (7.5 cm) in standard length. Sexual dimorphism is subtle, with males typically displaying slightly more intense coloration and larger dorsal fins compared to females. This species possesses a robust, laterally compressed body, and its mouth is equipped with small, conical teeth adapted for grazing on algae. The dorsal fin is long and continuous, featuring 13-14 spines and 12-14 soft rays, while the anal fin comprises 2 spines and 12-14 soft rays. Defensive adaptations include a tendency to inhabit rocky crevices and coral reefs, where they can quickly retreat from predators.
Behavior & temperament
Chrysiptera parasema is known for its territorial behavior, often establishing dominance hierarchies within small groups. They are primarily found in the mid-water column and are highly active swimmers. Breeding behavior involves the establishment of nesting sites within crevices, where males perform courtship displays to attract females. Their temperament can be described as semi-aggressive, particularly towards conspecifics and other small fish, making it essential to provide ample space and hiding spots in a captive environment to mitigate aggression.
Diet & feeding
In the wild, the Yellowtail Blue Damselfish primarily feeds on algae, zooplankton, and small invertebrates. In captivity, they thrive on a varied diet that includes high-quality flake foods, pellets, and frozen or live foods such as brine shrimp and mysis shrimp.
Behind the name
The genus name 'Chrysiptera' is derived from the Greek words 'chrysos' meaning 'gold' and 'pteron' meaning 'fin', while the species name 'parasema' translates to 'near the sign', possibly referring to its distinctive coloration.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
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