{"product_id":"black-widow-tetra-gymnocorymbus-ternetzi","title":"Black Widow Tetra - Gymnocorymbus ternetzi","description":"\u003ch1\u003e\n\u003cspan\u003eBlack Widow Tetra – \u003c\/span\u003e\u003cem\u003e\u003cspan\u003eGymnocorymbus ternetzi\u003c\/span\u003e\u003c\/em\u003e\n\u003c\/h1\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack Widow Tetra\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a hardy, deep-bodied South American tetra with bold dark fins, a silver body and classic black skirt-like markings. Also known as the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack Skirt Tetra\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGymnocorymbus ternetzi\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a reliable choice for peaceful community aquariums, provided it is kept in a proper group. It is active, adaptable and beginner-friendly, but it can become nippy if kept in small numbers or mixed with slow long-finned tank mates.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Identification:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eCommon Name:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Black Widow Tetra\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eOther Names:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Black Skirt Tetra, Black Tetra, Petticoat Tetra, Blackamoor Tetra\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eScientific Name:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cspan\u003eGymnocorymbus ternetzi\u003c\/span\u003e\u003c\/em\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eFish Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Tetra \/ Characin\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eWater Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Freshwater\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eNatural Range \u0026amp; Habitat:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cem\u003e\u003cspan\u003eGymnocorymbus ternetzi\u003c\/span\u003e\u003c\/em\u003e\u003cspan\u003e is native to South America, where it is recorded from the Paraguay and Guaporé River basins through to Argentina. In the wild, it occupies freshwater habitats where adults are usually found in the middle and upper water layers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIn the aquarium, it does well in planted setups with open swimming space, shaded areas and gentle to moderate water movement. Floating plants, darker décor and planted edges can help the fish feel secure while leaving enough room for group movement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAppearance \u0026amp; Adult Size:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBlack Widow Tetras have a deep, laterally compressed body with a silver to grey base colour, dark vertical shoulder bars and a blackish anal fin that gives the fish its “skirt” appearance. Young fish are usually darker and more strongly marked, while mature adults may become paler or more silvery with age.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAdults usually reach around \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5–7 cm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with females often fuller-bodied and slightly larger than males. Males are usually slimmer and may show more defined fin shape.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAquarium Suitability:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is a hardy and adaptable community tetra for mature tropical aquariums. Black Widow Tetras suit planted community tanks, mixed tetra displays and peaceful South American-style aquariums. They are more robust than very small tetras, so they can work well with other medium-sized peaceful fish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThey are not ideal for tiny nano aquariums, very shy species, delicate long-finned fish, male bettas, fancy guppies or slow fancy varieties that may attract fin-nipping.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eRecommended Aquarium Size:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA practical minimum is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e75 litres for a group\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with a tank length of at least \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e60 cm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e recommended. Larger aquariums of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e90–120 litres or more\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e are better for larger groups and mixed community setups.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eKeep in a group of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eat least 6\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8 or more\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e preferred. A larger shoal helps reduce chasing, improves confidence and keeps most social interaction within the group.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWater Conditions:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eTemperature:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 20–26°C\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003epH:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 6.0–8.0\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eHardness:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Soft to moderately hard\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eAdditional Notes:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Black Widow Tetras are adaptable if water quality is stable. Keep ammonia and nitrite at zero, maintain low nitrate and avoid sudden water-chemistry changes. They do not need extreme blackwater conditions, but they appreciate clean water, plant cover and some shaded areas.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTemperament \u0026amp; Tank Mates:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAquarium Category:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Community Fish\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBlack Widow Tetras are peaceful community fish when kept correctly, but they are active and may nip fins if kept in too small a group. Suitable tank mates include other medium peaceful tetras, rasboras, danios, peaceful barbs, Cory-type catfish, bristlenose plecs, dwarf cichlids, rainbowfish and calm livebearers in compatible water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAvoid male bettas, fancy guppies, angelfish with extended fins, long-finned gouramis, very shy nano fish and slow fancy fish. Keep them in a group so their energy is directed toward natural shoaling and mild in-group bickering rather than tank mates.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFeeding:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBlack Widow Tetras are easy-feeding omnivores. Offer quality flakes, small granules or micro pellets as the staple diet. Supplement with frozen or live foods such as daphnia, cyclops, brineshrimp, mosquito larvae and small bloodworm. Occasional vegetable-based or spirulina foods can be included for balance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFeed small amounts that are eaten quickly. A varied diet helps maintain condition, colour and activity.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eBehaviour in the Aquarium:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis species usually swims in the middle and upper areas of the aquarium. It is active but not overly frantic, often moving in a loose group rather than a tight school. Some chasing, displaying and bickering is normal, especially between mature individuals.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBlack Widow Tetras are egg scatterers and do not provide parental care. If spawning occurs in a community tank, eggs and fry are usually eaten unless a separate breeding setup is used.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCare Notes:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAdd Black Widow Tetras only to a mature, fully cycled aquarium. Keep them in a proper shoal, provide open swimming space and avoid slow long-finned tank mates. They are hardy, but still require regular water changes, good filtration and stable conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLong-finned and pale colour forms are sometimes sold under related trade names. Avoid artificially dyed varieties, as dyeing is harmful and should not be supported.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eRecommended For:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBeginner to intermediate\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAvailability:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCommon \/ Usually captive-bred\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eImage Disclaimer:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eAll images are a visual representation of the fish you will receive, made to be as accurate as possible. Natural variation in size, body colour, fin colour, bar intensity and markings can occur between individual fish.\u003c\/span\u003e\u003c\/p\u003e","brand":"Warehouse Aquatics","offers":[{"title":"Small","offer_id":43697631035466,"sku":"AG-103319","price":1.55,"currency_code":"GBP","in_stock":false},{"title":"Medium","offer_id":43697631068234,"sku":"AG-103320","price":1.75,"currency_code":"GBP","in_stock":false},{"title":"Large","offer_id":43697631101002,"sku":"AG-103321","price":1.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1877\/2298\/files\/BlackWidowTetra-Gymnocorymbusternetzi.jpg?v=1781280377","url":"https:\/\/warehouse-aquatics.co.uk\/products\/black-widow-tetra-gymnocorymbus-ternetzi","provider":"Warehouse Aquatics","version":"1.0","type":"link"}