Cartilaginous Fish

Nutrition

Skates and rays

They can be carnivores and eat small fish, molluscs and other invertebrates

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

Some species eat placton

They go swimming around oceans of all the world whith the mouth open eating the placton

Sharks

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

There are also species that eat placton like the basking shark

Reproduction

Sexual reproduction

Oviparus

This is when the mother put eggs and are oppened outside

Ovoviviparus

Most cartilaginous fish are ovoviviparus, this means that the eggs are opened inside the mother and then the babys are born

Habitat

Salty water

Shite shark

Spotted eagle

Fresh water

Sand tiger shark

Potamotrygon motoro

Interaction

Sharks

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.

Skates and rays

Anatomy

Shark

The sharks have a very aerodinamic body perfect to swim very fast and for hunt

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