Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade
Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago. Acanthodians are often referred to as "spiny sharks"; though they are n
The butterfly fish is a generally small sized species of marine fish, found in tropical and subtropical waters, primarily around coral reefs. The butterfly fish is well known for it's brightly coloured body and elaborate markings.
There are more than 100 different species of butterfly fish found distributed throughout the Atlantic, Indian and Pacific oceans, meaning that the butterfly fish is a salt-water species of (marine) fish.
The average butterfly fish is fairly small and generally grows to around 4 or 5 inches in length. Some species of the butterfly fish however, are known to grow to 8 inches (20 cm) long and some butterfly fish individuals have been known to grow to 30 cm
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The African Clawed Frog is a large species of flat Frog that is primarily found dwelling at the bottom of lakes and rivers. The African Clawed Frog is also known as the Platanna and has a number of very unique features that mean it is specially adapted to it's habitat. The African Clawed Frog is thought to have originated in South Africa, and is today found naturally across the African continent. The African Clawed Frog has also been introduced to the Americas and parts of Europe.
