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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.
Paratilapia polleni is a medium-sized cichlid endemic to Madagascar.It is also a popular fish for display at public aquaria. [2] [3]It is sometimes referred to by the common names starry-night cichlid, polleni cichlid, and black diamond cichlid, while marakely (black fish) is one of its native names.
The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ in bony fish (but not cartilaginous fish [1]) that functions to modulate buoyancy, and thus allowing the fish to stay at desired water depth without having to maintain lift via swimming, which expends more energy. [2]
Swim bladder disease, also called swim bladder disorder or flipover, is a common ailment in aquarium fish. The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy , and thus to stay at the current water depth without having to waste energy in swimming. [ 1 ]
[4] [5] Careful timing of the pelvic fin movement during whole-body movements allows the pelvic fins to generate forces that dampen the forces from the entire body, therefore stabilizing the fish. For maneuvers, electromyogram data shows that pelvic fin muscles are activated after the start of the maneuver, indicating that the fins are used ...
Kiwi, a seven-year-old saltwater fish, developed a cataract and was getting bullied by his tank mates.
Other fast moving fish such as Giant Danios can be used as dither fish. Also remember, if you have a breeding pair Convicts in a 40-gallon or smaller you will be most likely be unable to keep the convicts with any tank mates. But if your tank mates have established any type of dominance they will however breed and live together.
Female gourami sometimes bother other fish, but usually keep to themselves. Though aquarists are typically told not to house multiple gouramis together, three spot gouramis that have been brought up together in pairs (usually females, especially if they are siblings) and that have stable personalities, can successfully cohabit with each other ...