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The oscar (Astronotus ocellatus) is a species of fish from the cichlid family known under a variety of common names, including tiger oscar, velvet cichlid, and marble cichlid. [2] In tropical South America, where the species naturally resides, A. ocellatus specimens are often found for sale as a food fish in the local markets.
The breeding habits of this fish are somewhat elusive [11] but it is thought that breeding may take place over a couple of days during December or January. The timing depends on when the rivers and streams begin to swell due to the start of the rainy season. Females will lay their eggs in submerged vegetation in shallow water close to the shore ...
Marine fish can produce high numbers of eggs which are often released into the open water column. The eggs have an average diameter of 1 millimetre (0.039 in). The eggs are generally surrounded by the extraembryonic membranes but do not develop a shell, hard or soft, around these membranes. Some fish have thick, leathery coats, especially if ...
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.
The front half of the fish is mostly silver but the rear has alternating gold and black vertical bars. Like most poeciliids, Neoheterandria elegans is a livebearer. The male uses his modified anal fin, or gonopodium, to deliver sperm to the female. The fertilized eggs grow within the female until they hatch, and the young are released free ...
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Breeding convicts is as simple as having a male and a female in the same tank with adequate water quality and feeding. There is no special conditioning required. Due to their prolific breeding in captivity, there is a very low demand for Convict fry, and one may easily find their aquarium overstocked with an inbreeding population of Convicts ...
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