Cartilaginous Fish

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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