Here’s a care guide for the Birdmouth Wrasse (Gomphosus varius) — also known as the Bird Wrasse or Green Bird Wrasse.
 
 
 
 
🐠 
Overview
 
 
Scientific name: Gomphosus varius
Common names: Birdmouth Wrasse, Bird Wrasse, Green Bird Wrasse
Origin: Indo-Pacific region
Adult size: Up to 25–30 cm (10–12 in)
Lifespan: 8–10 years
Temperament: Semi-aggressive, very active
 
 
 
 
 
🌊 
Tank Requirements
 
 
Minimum tank size: 400 litres (90 gallons)
Aquascape: Plenty of open space for swimming, plus live rock for hiding
Substrate: Sand (they may rest on or bury in it occasionally)
Lighting: Moderate
Flow: Moderate to strong
 
 
 
 
 
⚖️ 
Water Parameters
 
 
Temperature: 24–27 °C (75–81 °F)
pH: 8.1–8.4
Salinity: 1.020–1.025 SG
Ammonia/Nitrite: 0 ppm
Nitrate: < 20 ppm
 
 
 
 
 
🍤 
Diet
 
 
Carnivorous — feed a varied meaty diet:
 
Frozen mysis shrimp and krill
Chopped prawn, clam, or squid
Quality marine carnivore pellets
Occasional live food for enrichment
 
 
Feed twice daily, as they are very active swimmers.
 
 
 
 
🤝 
Compatibility
 
 
Temperament: Bold and semi-aggressive, especially males.
Tankmates: Larger, active species such as tangs, triggers, angels, and other wrasses.
Reef safety: Not reef safe — will eat ornamental shrimp, crabs, and smaller invertebrates.
Avoid: Small, slow, or peaceful fish.
 
 
 
 
 
🪸 
Additional Notes
 
 
Males are vivid green; females and juveniles are brownish with lighter underbellies.
Known for their long “beak-like” mouth, used for picking crustaceans from crevices.
Excellent jumper — ensure the tank has a tight-fitting lid.
Hardy and adaptable once settled.