There are more kinds of fish than all other kinds of water and land vertebrates put together. The various kinds of fish differ so greatly in shape, color, and size that it is hard to believe they all belong to the same group of animals. Importance of Fish Fish help keep the number of organisms on the earth in balance.
Fish feed on some aquatic organisms and themselves become food for others.
Sometimes scientists use big funny words to explain which side of the fish they are talking about. This easy guide deciphers the technical talk for you. This site lists Australian fish species by common name. Each links lead to a page with a brief summary on each species. Fish Body Forms and Lifestyles Body form affects the mechanics and adaptations of fish to swimming and moving in the water.