How do fish have sex

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Depending on the species, determining the sex of a fish ranges from easy to nearly impossible. Knowing the sexual differences in aquarium fish is important when trying to breed fish and also for choosing the proper balance of fish for a community aquarium. Although not all fish can be easily identified by sex, these tips will help you recognize the sex of many of the common species of aquarium fish. Here is how you can figure out the sex of common aquarium fish.
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Sex Lives of Fish

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How Do Fish Have Sex and Reproduce? | Sport Fishing Magazine

Fish reproductive organs include testes and ovaries. In most species, gonads are paired organs of similar size, which can be partially or totally fused. The genital papilla is a small, fleshy tube behind the anus in some fishes, from which the sperm or eggs are released; the sex of a fish often can be determined by the shape of its papilla. Most male fish have two testes of similar size. In the case of sharks , the testes on the right side is usually larger [ citation needed ]. The primitive jawless fish have only a single testis, located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.
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How to Determine the Sex of Your Fish

All living things reproduce; this is an essential part of survival for each species to ensure they do not become extinct. Freshwater and saltwater fish are no exception. Much like many other animals, most fish require both a male and a female to create new life; however some fish are asexual and can reproduce alone. Other than that the rest of their traits vary widely, including the many different ways of mating and creating new life. All species of fish reproduce.
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All rights reserved. They have as many different kinds of reproductive behavior and strategies as exist in all the other vertebrates combined. And females are hardly passive accessories. For some reason, reef living in particular has had a diversifying effect on sexual expression. Other fishes opt for a unisex approach, assuming both male and female identities simultaneously, or sequentially.

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