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A pregnant Southern platyfish. Pregnancy has been traditionally defined as the period of time eggs are incubated in the body after the egg-sperm union. [1] Although the term often refers to placental mammals, it has also been used in the titles of many international, peer-reviewed, scientific articles on fish.
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.
Fingerling – refers to a fish that has reached the stage where the fins can be extended and protective scales have covered the body. [4] At this stage, the fish is typically about the size of a human finger, [5] hence the name. Once reaching this stage, the fish can be considered a juvenile, and is usually active enough to move around a large ...
Livebearers are fish that retain their eggs inside the body and give birth to live, free-swimming young. They are especially prized by aquarium owners. They are especially prized by aquarium owners. Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include: guppies , mollies , platies and swordtails .
Commercial fisheries exist for the largest species, making them important food fish. However, the U.S. Food and Drug Administration warns pregnant or breastfeeding women against eating tilefish and some other fish due to mercury [broken anchor] contamination. [6] [7] Exceptionally colorful smaller species of tilefish are favored for aquariums.
Pregnancy in fish; Pufferfish mating ritual; R. Reproduction and vocalization in midshipman fish; S. Slime coat; Spawning trigger This page was last edited on 26 ...
Pompanos (/ ˈ p ɒ m p ə ˌ n oʊ / POM-pə-noh) are marine fish in the genus Trachinotus in the family Carangidae (better known as "slabs"). Pompano may also refer to various other, similarly shaped members of the Carangidae, or the order Perciformes. Their appearance is of deep-bodied fishes, exhibiting strong lateral compression, with a ...
Fish embryos go through a process called mid-blastula transition which is observed around the tenth cell division in some fish species. Once zygotic gene transcription starts, slow cell division begins and cell movements are observable. [4] During this time three cell populations become distinguished. The first population is the yolk syncytial ...
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