🐠 Black Longfin Grouper (Epinephelus longispinis)
A Robust Brown Body With Reddish-Brown Spots • A Patient Ambush Predator • A Rewarding Centrepiece for Very Large Tanks
 
📋 The Black Longfin Grouper, also known as the Longspine Grouper, is a robust brownish grouper covered in small reddish-brown spots that grow more numerous and elongated toward the rear of the body.
It lives on coral and rocky reefs across the Indian Ocean, from Kenya and South Africa east to the Banda Sea, resting motionless near reef structure before striking at passing prey. Like many groupers, it develops real personality over time, often recognising its keeper and becoming interactive, which makes it a rewarding long-term centrepiece.
It can reach about 55cm, larger than many similarly named "longfin grouper" species in the trade, so plan on a very large, dedicated tank (at least 950L for an adult) with strong filtration. It's a fish-only species: it will eat fish, crustaceans, and shrimp small enough to fit in its mouth.
 
💡 Highlights
🎨 A Distinctive Spotted Pattern: A robust brown body with reddish-brown spots
🎯 A Patient Ambush Predator: Rests motionless, then strikes
🧠 Real Personality: Often recognises its keeper
📏 Up to 55cm: A centrepiece for very large tanks
🪸 Fish-Only: Will eat fish, crustaceans, and shrimp