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Coptodon zillii, commonly known as the Redbelly Tilapia, is a species of cichlid fish native to freshwater and brackish habitats in Africa and the Middle East. It is characterized by its deep, compressed body, often with a reddish tint on the belly, especially in breeding males. This species is highly adaptable and has been widely introduced globally, often becoming an invasive species due to its rapid reproduction, broad diet, and tolerance to various environmental conditions. It is known for its herbivorous tendencies, feeding primarily on aquatic vegetation and algae, but it is an opportunistic omnivore.
Características físicas
- Formato do corpo
- compressed
- Coloração
- Overall silvery-grey to olive-green, often with 7-9 dark vertical bars on the flanks that may fade or intensify depending on mood and environment. The most distinctive feature is the reddish to orange coloration on the belly and lower fins, particularly prominent in breeding males. Dorsal fin has a dark blotch (tilapia spot) at the posterior end of the soft-rayed portion. Caudal fin is typically emarginate to slightly rounded, often with faint barring.
- Tipo de escama
- ctenoid
- Posição da boca
- terminal
- Características distintivas
- Deep, compressed body, Reddish coloration on the belly and lower fins (especially in breeding males), Dark 'tilapia spot' on the soft-rayed portion of the dorsal fin, 7-9 faint to prominent vertical bars on the flanks, Large, protractile mouth with small, conical teeth
- Nadadeira dorsal
- Long, continuous dorsal fin with 14-17 spines and 10-13 soft rays. A prominent dark blotch (tilapia spot) is present on the posterior soft-rayed portion.
- Nadadeira caudal
- Caudal fin is typically emarginate to slightly rounded, often with faint vertical barring.
- Nadadeira peitoral
- Pectoral fins are relatively short and rounded.
- Nadadeiras características
- Pelvic fins are thoracic, often with a reddish hue, especially in breeding individuals. Anal fin has 3 spines and 8-10 soft rays, often with a reddish margin.
Dicas de identificação
Body Shape
Look for a deep, laterally compressed body typical of cichlids.
Coloration
Observe the reddish or orange tint on the belly and lower fins, particularly in mature males. The presence of 7-9 vertical bars on the flanks is also a key indicator.
Dorsal Fin Spot
A distinct dark blotch (tilapia spot) on the soft-rayed posterior part of the dorsal fin is a reliable identifying mark.
Mouth and Teeth
Examine the mouth for small, conical teeth arranged in several rows, characteristic of herbivorous tilapias.
Fin Ray Counts
For definitive identification, fin ray counts (D: XIV-XVII, 10-13; A: III, 8-10) can be used, though this requires careful examination.
Habitat
- Tipo de água
- freshwater
- Profundidade
- Typically found in shallow waters, often less than 5 meters, but can inhabit deeper areas.
- Ambiente
- Lakes, rivers, canals, irrigation ditches, ponds, and estuaries. Prefers areas with abundant aquatic vegetation, submerged structures, or muddy bottoms. Tolerant of a wide range of salinities, temperatures, and oxygen levels, allowing it to thrive in diverse and often disturbed habitats.
- Distribuição geográfica
- Native to North and West Africa (e.g., Nile River basin, Lake Chad basin, coastal rivers of West Africa) and the Middle East (e.g., Jordan River system). Widely introduced globally, including North America, Central and South America, Asia, and other parts of Africa, often becoming invasive.
Informações sobre aquário
- Nível de cuidado: intermediate
- Temperamento: aggressive
- Alimentação: omnivore
- Tamanho mínimo do aquário: 75 gallons (280 liters) for a single specimen, larger for groups
- Temperatura: 22-28°C (72-82°F)
- Nível de pH: 7.0-8.5
- Dureza da água: 10-25 dGH
- Compatibilidade: Generally not suitable for community tanks due to its aggressive and territorial nature. Best kept in species-specific tanks or with other large, robust cichlids that can defend themselves. Avoid smaller, docile fish.
- Requisitos especiais: Requires a spacious tank with plenty of hiding spots created by rocks, caves, and driftwood. Substrate should be sand or fine gravel as they enjoy digging. Excellent filtration is essential due to their messy eating habits and waste production. Live plants may be uprooted or eaten.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Breeds year-round in tropical climates, with peak activity often coinciding with warmer temperatures and increased food availability. In temperate regions, breeding is seasonal, typically in warmer months.
- Preço de mercado: Varies significantly by region and whether it's for food or ornamental trade. In some regions, it's a low-cost food fish; in others, an invasive pest.
- Importância comercial: medium
- Sabor: Mild, slightly earthy
- Textura: Flaky, firm white flesh
- Métodos de preparo: Frying, Baking, Grilling, Steaming
- Valor nutricional: Good source of lean protein, omega-3 fatty acids, and essential vitamins and minerals.
Fatos principais
Invasive Successamazing
Coptodon zillii is one of the most widely introduced and successful invasive fish species globally, largely due to its adaptability, rapid reproduction, and broad diet.
Parental Carebehavior
Unlike many other tilapia species that are mouthbrooders, Coptodon zillii is a biparental substrate spawner, with both parents guarding the eggs and fry.
Dietary Flexibilitybehavior
While primarily herbivorous, feeding on algae and aquatic plants, C. zillii is an opportunistic omnivore and will consume invertebrates, detritus, and even small fish when available.
Temperature Toleranceinteresting
This species can tolerate a wide range of temperatures, from as low as 8°C to over 37°C, contributing to its success in diverse environments.
Taxonomic Shiftevolution
Historically, Coptodon zillii was classified under the genus Tilapia (as Tilapia zillii). However, molecular and morphological studies led to its reclassification into the genus Coptodon.
Informações de segurança
Seguro- Nível de segurança: safe
- Venenoso: Não
- Comestibilidade: edible
- Observações de manuseio: Coptodon zillii possesses sharp dorsal and anal fin spines, which can inflict painful punctures if not handled carefully. Use gloves or a towel when handling to avoid injury. They are not venomous, but secondary infections can occur from punctures. They can be quite slippery and active when caught.
Espécies similares
Nile Tilapia
Oreochromis niloticus
O. niloticus typically has a more silvery body, often with faint vertical bars but lacks the prominent reddish belly coloration of C. zillii. The caudal fin of O. niloticus usually has distinct vertical bars, whereas C. zillii's caudal fin is often plain or with very faint barring. O. niloticus is a maternal mouthbrooder, while C. zillii is a substrate spawner.
Blue Tilapia
Oreochromis aureus
O. aureus is generally more bluish-grey and lacks the reddish belly. It often has a more pointed snout and a less deep body compared to C. zillii. Like O. niloticus, it is a maternal mouthbrooder.
Mozambique Tilapia
Oreochromis mossambicus
O. mossambicus males develop a more pronounced, often blackish, breeding coloration with a white chin. It lacks the distinct reddish belly of C. zillii and the dorsal fin spot is usually absent or very faint. It is also a maternal mouthbrooder.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Cichliformes
- Família
- Cichlidae
- Gênero
- Coptodon
- Espécie
- Coptodon zillii
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