🐠 Blue & Yellow Grouper (Epinephelus flavocaeruleus)
A Solid Blue Body With Vivid Yellow Fins • A Colour-Changing Juvenile • A Giant for Very Large Tanks
 
📋 The Blue & Yellow Grouper, also known as the Coral Cod, is a striking juvenile with a solid blue body and vibrant yellow fins. As it matures the yellow gradually fades and the body shifts toward grey-black, so the fish you buy is the first chapter of a long story.
It lives in the Indian Ocean, including the east coast of Africa, among shallow reef coral as a juvenile and in deeper water as it matures. It won't bother corals directly, but it will eat clean-up crew invertebrates and any fish it can fit in its mouth, so it suits a fish-only system.
It grows very large, up to about 90cm, so it's a showpiece for a big plan: at least 700L to start, and a much larger system for a mature adult, with strong filtration for its heavy bioload. Feed it a few times a week and it will become a long-lived, characterful favourite.
 
💡 Highlights
🔵 Solid Blue With Vivid Yellow Fins: A striking juvenile
🎭 Changes as It Grows: The yellow fades toward grey-black
🐟 A Large Predator: Will eat any tankmate small enough to swallow
📏 Up to 90cm: A showpiece for very large tanks
🪸 Fish-Only: Eats clean-up crew invertebrates and small fish