Q:

How Are Fish Born?

A:

Quick Answer

There are three types of fish reproduction. The first and most common one, found in 97% of fish, is ovaparity. The other two types are oviviparity and viviparity. As in humans, male fish produce sperm, and female fish produce eggs in their ovaries.

Continue Reading
Related Videos

Full Answer

The most common fish reproduction, ovaparity, is an external fertilization process in which unfertilized eggs are laid. This is called spawning. A few species of fish, such as salmon, migrate long distances to spawn. Depending on the species of fish, eggs are laid in various places and methods to protect the eggs from predators. Some species prepare nests, some make bubble structures to protect the eggs and others incubate the eggs in their mouths. The percentage of eggs laid externally that survive to become fish is very small, so multiple eggs are laid at the same time.

Viviparity is an internal fertilization and development process most familiar to humans. An embryo is attached to the mother's blood supply, similar to a placenta, so it receives direct nourishment from the mother and is born alive.

Oviviparity is also an internal fertilization and development process, but the egg is not connected to the mother's blood supply. The embryo is developed inside the egg, which provides nourishment. This fish is also born alive.

Learn more about Fish

Related Questions

  • Q:

    What Is a Marlin?

    A: A marlin is a type of fish with a spear-like snout, elongated body and rigid dorsal fin. Marlins can weigh hundreds to thousands of pounds. Despite their l... Full Answer >
    Filed Under:
  • Q:

    How Do You Build a Fish House?

    A: Build a fish house by visiting Knoji.com or WisconsinOutdoor.com to check out their basic plans for building an ice fishing house. Alternatively, visit MnS... Full Answer >
    Filed Under:
  • Q:

    What Is the Lifespan of Koi Fish?

    A: Koi fish have a typical life span ranging from 50 to 70 years. There are authenticated cases, however, in which koi have lived over 200 years. Full Answer >
    Filed Under:
  • Q:

    Do Fish Have Bones?

    A: Some fish have bones, including full backbones and articulated skeletons, while other fish do not have bones. The bony fish, as they are known, belong to t... Full Answer >
    Filed Under:

Explore