Tripterygiidae

Estuarine triplefin

Forsterygion nigripenne

Nine Centimeters Tripterygiid Fish from the Pacific Ocean

• Black
• Temperate
• Southern Hemisphere
• Regional distribution
• Brackish fish
• Pacific Ocean
• Oceania
• Elongated
• Small
• Temperate fish

The estuarine triplefin or cockabully (Forsterygion nigripenne) is a species of triplefin blenny in the genus Forsterygion. It was described by Achille Valenciennes in 1836. It is found in the Southwest Pacific, throughout New Zealand.