this is coming from the book called marine fishes by scott w. michael. it's a great book. max. length 11 in. minimum tank for an adult 100 gal
. it eats meaty foods such as mysis,and brine shrimp and other kinds of frozen food.it says they are hardy. it says they are very active. it needs alot of swimming room as well as hiding places. males are green and females are brown. it will grab an enlongate prey fish in it's jaws and bash it against the substrate until it breaks into bit sized peices. it is a proficient jumper and will leap out of open tanks. like i said i love this book. hope this helps you.