According to Wikepedia, fish are the gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term “fish” is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a typological, but not a phylogenetic classification.Ichthyology is the study of all classes of fish.The look ie shape of a fish gives us information about the particular fish we can deduce just by looking at the fish certain characteristics such as Calm, Agitated, delicate structure etc Some fish can be beautiful and entertaining to see; although we are aware of fish species mostly used to beautify our environment, there are many more you may not know exist because they are safely tucked away underneath the water. Our top picks of the most beautiful fish in the world are:
Moorish IdolThe Moorish idol are small fish species found in the Indian ocean, Japan and South Africa. They are social in nature and are mostly found in a group with a distinct ribbon like yellow and black colored bodies. They live in coral reefs and spend lots of time in surface of the ocean
Lion FishLion fish is one of the most attractive and quite poisonous fish species. characterized by their long red and white stripes, they come in various colors The stripes of lion fish help them to defend against enemies.
French Angel FishFrench Angel fish is native to Caribbean seas. With an attractive pale mouth and a yellow and black body, the french Angel Fish can grow up to 24 inches in size.
Blueface Angel FishThe Blueface angel fish are native to Indo-Pacific region. They are the most colorful member of angelfish family. As the name indicates they have a deep blue colored face with a light yellow and blue colored body.
Clown FishClown fish one of the most colorful fishes in the world, found mostly in coral reefs. There are 28 different species of clown fish. They are colored bright orange with three distinctive white stripes. Clown fish are all born as males and they switch to female upon maturity.
MandarinfishThis very colorful and attractive fish is native to Indo-Pacific region. With their characteristic blue-green color and orange lines,they live in lagoons and coral reefs. It is one of very active and peaceful aquarium fishes in the world.