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Tilapia zillii, commonly known as Tilapia de Zill or Redbelly Tilapia, is a species of cichlid fish native to freshwater and brackish environments in Africa and the Middle East. It is characterized by its robust body, often with a reddish tint on the belly, especially during breeding. 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 varying environmental conditions. It is known for its herbivorous and detritivorous feeding habits, playing a significant role in aquatic ecosystems where it is present.
Körperliche Merkmale
- Körperform
- compressed
- Färbung
- Generally olive-green to brownish-grey on the dorsal side, fading to silvery on the flanks and whitish on the belly. During breeding, males and sometimes females develop a distinct reddish or orange coloration on the belly and lower flanks. Seven to nine dark vertical bars may be present on the flanks, often more prominent in juveniles or stressed individuals. A distinct dark spot (tilapia spot) is usually present on the upper part of the operculum.
- Schuppentyp
- ctenoid
- Maulstellung
- terminal
- Besondere Merkmale
- Robust, deep body, Large scales, Often reddish coloration on the belly during breeding, Dark opercular spot, Spiny dorsal fin
- Rückenflosse
- Long, continuous dorsal fin with 13-16 spines and 10-15 soft rays. The spiny portion is longer than the soft-rayed portion.
- Schwanzflosse
- Caudal fin is truncate to slightly emarginate, often with faint vertical bars.
- Brustflosse
- Pectoral fins are relatively short and rounded.
- Auffällige Flossen
- Anal fin has 3 spines and 8-11 soft rays. Pelvic fins are thoracic.
Bestimmungstipps
Body Shape and Size
Look for a deep, compressed body. Adults typically reach 20-30 cm (8-12 inches) in standard length, with a maximum recorded size of about 40 cm (16 inches) and weight up to 2.5 kg (5.5 lbs).
Coloration
Observe the overall olive-green to brownish-grey color, often with a silvery sheen on the flanks. The presence of a reddish or orange belly, especially in breeding individuals, is a key indicator. Look for faint vertical bars on the flanks.
Opercular Spot
A distinct dark spot on the upper part of the gill cover (operculum) is usually present and can help differentiate it from some other cichlids.
Dorsal Fin
Note the long, continuous dorsal fin with a prominent spiny anterior portion. Count the spines (13-16) and soft rays (10-15) if possible.
Caudal Fin
The tail fin is typically truncate (straight-edged) to slightly emarginate (shallowly forked).
Lebensraum
- Wassertyp
- freshwater
- Tiefe
- Typically found in shallow waters, from surface to about 10 meters (33 feet).
- Umgebung
- Inhabits a wide range of aquatic environments including lakes, rivers, canals, irrigation ditches, ponds, and estuaries. Prefers areas with dense aquatic vegetation, submerged structures, or muddy bottoms. Tolerant of varying salinities, temperatures, and oxygen levels. Can thrive in both clear and turbid waters.
- Geografische Verbreitung
- Native to Africa (from Senegal to Egypt, including the Nile River system, Lake Chad basin, and coastal rivers of West Africa) and the Middle East (Jordan River system, coastal rivers of Israel and Lebanon). Widely introduced globally in tropical and subtropical regions, including North America (e.g., Florida, California, Arizona), Central and South America, Asia, and Europe.
Aquarieninformationen
- Pflegeaufwand: intermediate
- Temperament: aggressive
- Ernährung: omnivore
- Mindestbeckengröße: 200 gallons (for adults)
- Temperatur: 22-28°C (72-82°F)
- pH-Wert: 7.0-8.5
- Härte: 10-25 dGH
- Verträglichkeit: Best kept in a species-specific tank or with other large, robust cichlids. Not suitable for community tanks with smaller or docile fish.
- Besondere Anforderungen: Requires a large tank with plenty of hiding spots and robust filtration. Can be destructive to live plants. Known to dig extensively, so substrate should be fine gravel or sand. Provide a varied diet including vegetable matter.
Informationen zum Wildbestand
- Erhaltungszustand: least concern
- Saisonalität: Breeds year-round in tropical climates, with peak activity often linked to rainy seasons or warmer temperatures. In temperate introduced ranges, breeding is seasonal, typically in warmer months.
- Marktpreis: Varies significantly by region and market; generally low to moderate as a food fish.
- Kommerzielle Bedeutung: high
- Geschmack: Mild, slightly earthy
- Textur: Flaky, firm white flesh
- Zubereitungsarten: Frying, Baking, Grilling, Steaming
- Nährwert: Good source of lean protein, omega-3 fatty acids, and essential vitamins and minerals.
Wichtige Fakten
Invasive Successinteresting
Tilapia 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 tilapias (Oreochromis species) which are mouthbrooders, Tilapia zillii is a biparental substrate spawner, with both parents guarding the eggs and fry.
Dietary Flexibilitybehavior
This species is primarily herbivorous and detritivorous, feeding on algae, aquatic plants, and detritus, but will also consume small invertebrates and fish eggs, making it highly adaptable to various food sources.
Temperature Toleranceinteresting
Tilapia zillii can tolerate a wide range of temperatures, from as low as 8°C (46°F) for short periods to over 35°C (95°F), contributing to its invasive potential in diverse climates.
Aquatic Weed Controlinteresting
Due to its herbivorous diet, Tilapia zillii has been intentionally introduced in some areas for biological control of aquatic weeds, though this often leads to unintended ecological consequences.
Sicherheitsinformationen
Vorsichtig behandeln- Sicherheitsstufe: caution
- Giftig: Nein
- Essbarkeit: edible
- Hinweise zum Umgang: Tilapia zillii possesses sharp spines in its dorsal, anal, and pelvic fins. Care should be taken when handling to avoid painful punctures. While not venomous, these punctures can become infected if not properly cleaned. They can also deliver a strong bite if provoked.
Ähnliche Arten
Nile Tilapia
Oreochromis niloticus
Tilapia zillii has a more robust body and typically a reddish belly during breeding, whereas Oreochromis niloticus often has distinct vertical bars on the caudal fin and lacks the prominent reddish belly. O. niloticus is also a mouthbrooder, while T. zillii is a substrate spawner.
Blue Tilapia
Oreochromis aureus
Blue Tilapia generally has a more bluish-grey coloration and lacks the reddish belly of T. zillii. O. aureus also has a more pointed snout and is a mouthbrooder.
Mozambique Tilapia
Oreochromis mossambicus
Mozambique Tilapia typically has a larger mouth and a more rounded caudal fin. Breeding males of O. mossambicus develop a dark, almost black coloration with white lips, distinct from the reddish belly of T. zillii. O. mossambicus is also a mouthbrooder.
Wissenschaftliche Klassifikation
- Reich
- Animalia
- Stamm
- Chordata
- Klasse
- Actinopterygii
- Ordnung
- Cichliformes
- Familie
- Cichlidae
- Gattung
- Tilapia
- Art
- Tilapia zillii
Tilapia de Zill entdecken
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