Most bone-fish produce an large amount of smaal eggs that are put
in the water by the female shark and after that the eggs are
fertilized by the male. This way of reproduction is very wasty.
Many eggs and young fish are lost. How many eggs and young fish
die depends on some things in the environment in an area. Sharks
have other ways to reproduct themselves. The male fertilizes the
eggs in the female's body. To produce a small amount of eggs they
need a lot of energy. The better protected young sharks have more
chances to survive. Some sharks are ovipare, the lay very protected
eggs. Other species are vivipare and the bring living baby sharks.
This young animals were feeded in the body of the mother by a placenta
, that is analogous to other mammals. The male sharks have so called
"claspers", a sort of penis that is an modification of the the
stomachfinns. At young animals the clisper is small ans soft,
when the shark gets older the clisper gets harder due to chalking.
During the copulation one of the two clispers is brung into the
genital hole of the female. By some species the top of the clisper
is split in two particles. By this the clasper is saved to the female
and also there is a better way to transfer the sperm.
During the copulation the sperm is brung in the cloaca thru an
plooi in the clasper. In the beginning of the claspurs are two muscels that during the copulation
are filled with seawater. This water is pressed out of these muscles
during the copulation. This water spools the sperm in the oviduct of
the female. Sperm is produced in the testikels, and is saved
in pipes. At some species, like the blue sharks the sperm is saved
in small packages called spermatofors. With small flexible species
like the catshark, the male jumps around the female during the copulation.
Biggers species like stealshark male and female are laying ahead to
head, during the copulation. In both cases the clasper is switched to
the front, for the copulation.
Most bone-fish produce an large amount of smaal eggs that are put
in the water by the female shark and after that the eggs are
fertilized by the male. This way of reproduction is very wasty.
Many eggs and young fish are lost. How many eggs and young fish
die depends on some things in the environment in an area. Sharks
have other ways to reproduct themselves. The male fertilizes the
eggs in the female's body. To produce a small amount of eggs they
need a lot of energy. The better protected young sharks have more
chances to survive. Some sharks are ovipare, the lay very protected
eggs. Other species are vivipare and the bring living baby sharks.
This young animals were feeded in the body of the mother by a placenta
, that is analogous to other mammals. The male sharks have so called
"claspers", a sort of penis that is an modification of the the
stomachfinns. At young animals the clisper is small ans soft,
when the shark gets older the clisper gets harder due to chalking.
During the copulation one of the two clispers is brung into the
genital hole of the female. By some species the top of the clisper
is split in two particles. By this the clasper is saved to the female
and also there is a better way to transfer the sperm.
During the copulation the sperm is brung in the cloaca thru an
plooi in the clasper. In the beginning of the claspurs are two muscels that during the copulation
are filled with seawater. This water is pressed out of these muscles
during the copulation. This water spools the sperm in the oviduct of
the female. Sperm is produced in the testikels, and is saved
in pipes. At some species, like the blue sharks the sperm is saved
in small packages called spermatofors. With small flexible species
like the catshark, the male jumps around the female during the copulation.
Biggers species like stealshark male and female are laying ahead to
head, during the copulation. In both cases the clasper is switched to
the front, for the copulation. 
