The most exciting aspect of this hobby is actually deciding which of the many species of saltwater aquarium fish you want to keep in yours. But what is important is that before you purchase any, you learn as much as you can about the various different species. Along with learning about how to care for them, you need to learn about what food they eat and what the ideal environment for them to live in is. Plus you need to learn about which species of tropical saltwater fish actually get along with others and which don't, and the amount of room they need to grow happily in any saltwater aquarium.
Fish
Fish are aquaticvertebrates that are cold-blooded, covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in fresh water, with species being known from mountain streams (e.g., char and gudgeon) as well as in the deepest depths of the ocean (e.g., gulpers and anglerfish).
They are of tremendous importance as food for people around the world, either collected from the wild (see fishing) or farmed in much the same way as cattle or chickens (see aquaculture). Fish are also exploited for recreation, through angling and fishkeeping, and fish are commonly exhibited in public aquaria. Fish have an important role in many cultures through the ages, ranging as widely as deities and religious symbols to subjects of books and popular movies.
The most exciting aspect of this hobby is actually deciding which of the many species of saltwater aquarium fish you want to keep in yours. But what is important is that before you purchase any, you learn as much as you can about the various different species. Along with learning about how to care for them, you need to learn about what food they eat and what the ideal environment for them to live in is. Plus you need to learn about which species of tropical saltwater fish actually get along with others and which don't, and the amount of room they need to grow happily in any saltwater aquarium.

