🐠 Bluefin Damselfish (Neoglyphidodon melas)
A Pale Blue-White Juvenile With a Yellow Dorsal Stripe • A Dramatic Shift to Dark Grey-Blue as an Adult • A Bold Adult Temperament Worth Planning For
 
📋 The Bluefin Damselfish, also known as the Black Damselfish, Bowtie Damselfish, or Royal Damsel, is sold as an attractive juvenile with a pale blue-white body, a bright yellow dorsal stripe, and vivid blue pectoral and anal fins.
It comes from reefs and lagoons across the Indo-West Pacific, including the Red Sea, Persian Gulf, East Africa, and Australia, typically solitary in the wild and often associating with soft corals, which make up much of its natural diet. Every Bluefin Damselfish we ship is feeding well.
As this species matures, it undergoes a fairly dramatic transformation, losing its vivid juvenile colours and becoming an almost uniform dark grey to blue-black, while also developing a real reputation for aggression. Adults are typically only suitable for a large tank stocked with other robust, similarly assertive fish, and should be kept singly unless the aquarium is very large. It can also pose a a threat to ornamental shrimp and may nip at soft corals. The charming juvenile you bring home is not a preview of the adult temperament or looks you'll end up with, so it's worth planning for the adult from the start. It remains a hardy, easy-care fish for keepers who go in with realistic expectations. It reaches up to 18cm, so a 190L tank suits it well.
 
💡 Highlights
🎨 Vivid Juvenile Colouration: Pale blue-white body with yellow and blue accents, fading with maturity
⚠️ Bold Adult Temperament: Territorial and assertive once mature
🧠 Extremely Hardy: Not picky about food, tolerant of a range of conditions
🌿 Reef Safe With Caution: May nip soft corals; a real threat to ornamental shrimp
🐟 Best Kept Singly: Only with large, robust tankmates unless the aquarium is very large