Name and describe three different reproductive strategies in fishes?

In many species of osteichthyes (bony fish), sperm and
eggs are developing in separate individuals - males and females. Fertilization is
usually external. In some cases, fertilization is
internal.

Males and females may show different or they
could not be distinguished, in terms of size, colors, external reproductive organs, head
or body shape characteristics.

The reproduction in fish
bone is generally cyclical, but it can be influenced by certain factors such as changes
in temperature, moon phases or changes of location of spawning
areas.

Fish bone have at least three types of development
of the embryo: the spawning (oviparous fish, egg-laying), egg retaining  (ovoviviparous)
and the birth of live young fish (viviparous).

In some
ovoviviparous species, the offsprings are developing in enormous eggs where they are fed
by the egg yolk until birth. At birth, they already have 30 cm and they are exact
miniature copies of their parents.

Although the
reproduction methods used by species of fish are heterosexual,  some species of fish are
hermaphroditic -  individuals develop both ovaries and testes.