The primary means of fish reproduction are egg laying and live bearing. Egg-laying fish release eggs that are later fertilized. Live-bearing fish internally fertilize the female, who carries the offspring within until th... More »

Bony fish have a variety of reproductive strategies, but in most species two separate sexes release sperm and eggs into the water, and fertilization occurs externally. Parental care is quite rare, but seahorses and a few... More »

Bettas, also known as Siamese fighting fish, reproduce via external fertilization, which means that the female releases eggs and the male releases milt. The male is responsible for creating a "bubble nest," which is wher... More »

Female chameleons are inseminated from the male by means of a hemipenis, which is an organ containing two tubular structures. The male circles the female, grabs her neck in his mouth, mounts her back and inserts his peni... More »

Mammals reproduce sexually, via the union of sperm and egg cells. Except for five species of egg-laying mammals, called monotremes, all mammals give birth to live young. More »

Killer whales, like all other mammals, reproduce through sexual reproduction, which requires the union of a male killer whale's sperm with a female killer whale's egg. Once conception occurs, the fertilized egg develops ... More »

Bettas, also known as Siamese fighting fish, reproduce via external fertilization, which means that the female releases eggs and the male releases milt. The male is responsible for creating a "bubble nest," which is wher... More »