General

Fish Reproduction



Fish eggs: fish breeding

Fish Reproduction - Summary of Key Features

Most fish species have ovuliparous reproduction (females do not protect eggs) and external fertilization. In fish there is the presence of males and females, being very common sexual dimorphism (imbalance in the amount of females and males of the same species).

Females usually lay eggs in calm water or even build nests.

Reproduction usually begins when the male deposits sperm in the water, making it possible to fertilize the eggs.

After hatching, fingerlings appear somewhat similar to adult fish. After this phase, the fish do not usually pay attention to the young. Some species of fish may even feed on these fingerlings (of the same or other species).

Biological curiosity:

- Fish eggs are released in large numbers, but the mortality rate is very high. These eggs have a moderate amount of nutritional reserve.

Tilapia (freshwater fish) fingerlings.