Cartilaginous Fish
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Anatomy
Rays and skates
The rays and the skates have a flat body and the fins are very big and are atached directly to the body
Shark
The sharks have a very aerodinamic body perfect to swim very fast and for hunt
Interaction
Sharks are lonely fish that onlly interact with other sharks of the same species when they have to reproduce or when they have hunt but they are not good friends when they have to hunt. They also can eat other sharks that are smaller.
Habitat
Fresh water
Potamotrygon motoro
Sand tiger shark
Salty water
Spotted eagle
Shite shark
Reproduction
Sexual reproduction
Ovoviviparus
Most cartilaginous fish are ovoviviparus, this means that the eggs are opened inside the mother and then the babys are born
Oviparus
This is when the mother put eggs and are oppened outside
Nutrition
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Sharks
There are also species that eat placton like the basking shark
Sharks are carnivorous fish, since they usually feed on other fish, crustaceans, mollusks and turtles. His way of hunting is stealth. First, they detect the prey from great kilometers away thanks to the vibrations that it produces in the water and that are interpreted by the shark
Skates and rays
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Some species eat placton
They go swimming around oceans of all the world whith the mouth open eating the placton
They can be carnivores and eat small fish, molluscs and other invertebrates
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Normally they go near the floor and when they found a fish or a mollusc they move their fins to attrap it and then eat it