Book excerpt: How do you choose the perfect combination of fish for your aquarium? How can you understand the nature and behavior of these slippery creatures? Is a freshwater tank ideal for my household and what kind of time commitment does a fish tank require? Discover an exciting underwater world with this invaluable guide to over 400 fascinating species of freshwater and marine fish. An easy reference format reveals the key characteristics of each breed, along with its origins, physiology, and care needs. You'll get peace of mind that you're aquarium will thrive for years to come. Cohesion inside your fish tank is essential to ensure that your fish and plants get in along in a healthy way and guarantee a long life inside your tank. Each entry includes an at a glance guide to basic aquarium requirements, feeding habits, and compatibility with other fish. Detailed photographs of each specimen clearly show its extraordinary markings and distinguishing features in glorious full color, and form a delightful visual reference. Discover your favorite fish and build your ideal tank before investing time and money. Whether you are a long time keeper, are looking to start an aquarium, or are simply fascinated by fish, this is the ultimate fish breed handbook.