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Sexual dimorphism is limited, though male jewel cichlids are typically more brightly coloured and in some species have more pointed anal, ventral and dorsal fins. In some species, such as Hemichromis cristatus, the females can have coloring as bright as the males. Like most cichlids, jewel cichlids have highly developed brood care.
Usually, the female lays about 400 eggs on a stone and the male immediately fertilizes them. [5] At a temperature of 25.5 °C, after 48 hours they hatch. [ 5 ] After five and a half days, the fry swims freely and are led mainly by the female, while the male is mainly engaged in the defense of the territory.
The African jewelfish needs slightly acidic water (generally pH 6.0–7.8) and warm water (72–82 °F or 22–28 °C) in order to thrive in captivity. [3] Because of the aggressive territorial behavior, it is often recommended keeping the species alone, but in large aquariums they can be kept with Congo tetras, Synodontis catfish and other robust species. [3]
Jewel cichlid, two-spotted jewel cichlid: Rubricatochromis bimaculatus: 14 cm (5.5 in) Lifalili jewel cichlid, blood-red jewel cichlid: Rubricatochromis lifalili: 8 cm (3.1 in) Ocellated kribensis: Pelvicachromis subocellatus: 5 cm (2.0 in) Rainbow krib: Pelvicachromis pulcher: 11 cm (4.3 in) Striped kribensis: Pelvicachromis taeniatus: 7 cm (2 ...
Among the maternal mouthbrooding cichlids, it is quite common (e.g., among the mbuna) for the male to fertilise the eggs only once they are in the female's mouth. Some cichlids are able to feed while mouthbrooding the eggs, but invariably they feed less often than they would otherwise do, and after mouthbrooding one batch of eggs, all ...
In 1986, it was even discovered amongst insects when butterfly scientist W.J. Tennent observed four male Mazarine blues competing for the attention of another male in Morocco. [5] Sexual behavior takes many different forms, even within the same species and the motivations for and implications of their behaviors have yet to be fully understood.
Dads tend to have the most fun hobbies — fishing, golfing, bird watching, and, if you're my father-in-law, storytelling.He tends to be an incredibly fun person to shop for this time of year, but ...
Apistogramma nijsseni is a species of cichlid fish, endemic to highly restricted local black water habitats in the Quebrada Carahuayte, a small stream in the Ucayali River drainage, southern Peru. [ 1 ] [ 3 ] The male reaches a maximum length of 8 cm (3 in), the female remaining somewhat smaller.