Science & Nature: Fish Breeds: This Guy Is One Of The Big Mac's Of The Hobby. Many Aquarist Buy This Cute Little Fishy Without Knowing That It Can Turn Into A Monster At 12 Inches (30 Cm). They Are Know For Their Personality And Love Rearranging The Aquarium Decor. They Are Difficult To Sex, Eat Almost Everything, And Are Very Territorial Once Mature