Catfish are a group of bottom-feeding fish that are found in freshwater habitats and coastal regions on and around every continent in the world with the exception of Antarctica. Catfish are most easily identified by their flattened broad heads and the long whisker-like barbels that protrude from the mouth of the catfish.
The long barbels of the catfish contain the taste buds of the catfish and so are often most commonly used for smelling and therefore sensing what is about to eat (and to hide from) in the surrounding waters. Despite the name however, not all catfish species have prominent whisker-like barbels.
There are nearly 3,000 known species of catfish in the world but it is
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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Ducks are medium sized aquatic birds related to other aquatic birds like swans and geese. Ducks differ from swans and geese in their tendency to dive into the water in order catch their food.
Ducks are omnivorous animals feeding on aquatic plants, small fish, insects and grubs both in and out of water meaning that ducks can easily adapt to different conditions. It is because of the duck's ability to eat such a diverse amount of food both in water and on dry land that makes ducks one of the most widespread birds in the world as they are found on every continent, with the obvious exception of Antarctica.
A duck's mouth contains rows of tiny plates that line their teeth, to help th
