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-Sharks are fish. Most fish have hard skeletons made of bone, but sharks have skeletons made of cartilage. This lighter and more flexible than bone.
-There are more than 450 types of sharks and they come in all shapes and sizes.

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-There have been sharks swimming in our seas for about 400 million years, 200 milion years before dinosaurus existed.
-Megalodon was a meat-eating sharks. It would have been 12-15 meters long.

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-Sharks' bodies are perfectly made for living in water. They have special ways of breathing, eating and swimming that have helped them survive for millions of years.
-Strong tail to power the shark through the water.
-Dorsal fin to help keep the shark upright and stable in the water.
-The shark uses its gills to breathe.
-Pectoral fins to help stop the shark sinking. Also used for steering.
-Sharp teeth for catching fish and other animals.
-A shark's skin is made from dermal denticles.
-Sharks have good eyesight, but their senses of hearing and smell are even better.

Vocabulary:
fin = aripioară;
gill = branhie;
steer = viraj;
denticle = dintisor.

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-White sharks - it is the largest of the predator sharks, and can be over six meters long.
-Lemon sharks - sometimes behave in a threatening way to divers, but adults are very timid.
-Blue sharks - makes them difficult to see both from the surface and under the water.
- Basking sharks - they feed by gulping in water that contains tiny sea creatures.
-Leopard sharks - are easily recognized by their dark spots.
-Nurse sharks - spend most of the day in shallow water on the seabed.
-Angel sharks
-Grey nurse sharks
-Hammerheads sharks
-Megamouth sharks
-Horn sharks
-Swell sharks

Vocabulary:
threaten = a ameninta;
spot = pată;
seabed = fundul marii;
gulp = a manca cu pofta; a înfuleca;

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-Sharks live in oceans all over the world. They are most common in warm water, though a few live as far north as the Arctic Ocean. Some sharks travel great distances, while others spend their entire lives in a small area.

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-Most sharks are predators and actively hunt for food. Only the whale shark, basking shark and megamouth shark feed by constantly grazing on small sea creatures. This is called filter-feeding.
-Tiger sharks' teeth are multi-purpose. They sharp point bites into prey, and the serrated edge cuts it up. The teeth are strong enough to crunch through a turtle's sheel and bones.

graze = a te hrani cu alge; a paște;
prey = prada;
sheel = carapace;
serrated = zimtat.

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-Most sharks give birth to live babies, called pups, but others lay eggs. Once the baby sharks are born or hatch, they must fend for themselves if they are to survive.
-Sweel shark eggs - the mother lays eggs protected in special egg case.
-Horn shark eggs - these egg cases are a funny spiral shapes and take around six to nine month to hatch.

Vocabulary:
hatch = a ecloza.