{"product_id":"black-widow-tetra-gymnocorymbus-ternetzi","title":"Black Widow Tetra - Gymnocorymbus ternetzi","description":"\u003cp\u003e\u003cstrong\u003eBlack Widow Tetra (Gymnocorymbus ternetzi)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Black Widow Tetra is a classic and hardy freshwater shoaling fish, recognised by its deep-bodied silver-grey shape, bold black vertical bars and dark flowing anal fin. Also known as the Black Skirt Tetra or Black Tetra, this species is active, adaptable and well suited to mature community aquariums. It is generally peaceful, but because it is lively and can occasionally nip long fins, it is best kept in a proper group with robust, peaceful tank mates rather than slow or delicate species.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Name:\u003c\/strong\u003e\u003cbr\u003eBlack Widow Tetra. Also commonly referred to as the Black Skirt Tetra, Black Tetra, Petticoat Tetra or Blackamoor Tetra.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eScientific Name (Latin):\u003c\/strong\u003e\u003cbr\u003eGymnocorymbus ternetzi\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Size:\u003c\/strong\u003e\u003cbr\u003eAround 6–7.5 cm, with mature females usually becoming slightly larger and fuller-bodied than males.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWater Type:\u003c\/strong\u003e\u003cbr\u003eFreshwater\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrigin \/ Natural Habitat:\u003c\/strong\u003e\u003cbr\u003eNative to South America, including the Paraguay and Guaporé River basins, with records extending towards Argentina. In the wild, Black Widow Tetras occupy middle and upper water layers in freshwater habitats where they swim in groups and feed on small invertebrates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWater Parameters:\u003c\/strong\u003e\u003cbr\u003eTemperature: 20–26°C\u003cbr\u003epH Range: 6.0–8.0\u003cbr\u003eHardness: soft to moderately hard water, around 5–19 dH\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTemperament:\u003c\/strong\u003e\u003cbr\u003eGenerally peaceful, but active and occasionally nippy if kept in too small a group or with unsuitable tank mates. Best kept with other confident community fish that will not be stressed by its movement or occasional chasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiet:\u003c\/strong\u003e\u003cbr\u003eOmnivorous. In nature, it feeds on worms, small crustaceans and insects. In the aquarium it should be offered a varied diet including quality flake, small pellets, micro granules, frozen daphnia, brineshrimp, cyclops, bloodworm and occasional live foods.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMinimum Tank Size:\u003c\/strong\u003e\u003cbr\u003eA practical recommendation is at least 80–100 litres for a proper group, with a 60 cm aquarium or larger as the minimum and a longer aquarium preferred for more natural swimming behaviour.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBehaviour \u0026amp; Activity:\u003c\/strong\u003e\u003cbr\u003eThis is an active mid-to-upper level shoaling fish that should be kept in a group of at least 6, ideally 8–10 or more. In good numbers, Black Widow Tetras are more confident, display better behaviour and are less likely to bother tank mates. They appreciate planted edges, open swimming space, subdued areas and a secure lid, as active tetras may jump when startled.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAquarium Category:\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCommunity Fish\u003c\/span\u003e\u003cbr\u003eThis species is suitable for a robust peaceful community aquarium. Suitable tank mates include other medium-sized tetras, rasboras, danios, peaceful barbs, Corydoras, bristlenose plecos, dwarf cichlids and other confident non-aggressive fish. Avoid bettas, fancy guppies, long-finned fish, very timid nano fish, aggressive cichlids and large predators.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecial Requirements or Care Notes:\u003c\/strong\u003e\u003cbr\u003eBest kept in a mature, well-filtered aquarium with clean water, stable parameters and regular maintenance. A darker background, planted cover and open swimming space will help show natural behaviour. Keeping this species in too small a group can lead to increased chasing and fin-nipping, so group size is one of the most important care points.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003cbr\u003eBeginner to intermediate fishkeepers\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailability:\u003c\/strong\u003e\u003cbr\u003eCommon in trade, usually as captive-bred stock\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eAll images are a visual representation of the fish you will receive, made to be as accurate as possible. Please note that Mother Nature is a wonderful thing, and variation in patterns and colours will occur — that is part of the unique beauty of these animals.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"Aqua Group","offers":[{"title":"Small","offer_id":46074717274285,"sku":"AG-103319","price":1.55,"currency_code":"GBP","in_stock":false},{"title":"Medium","offer_id":46074717307053,"sku":"AG-103320","price":1.75,"currency_code":"GBP","in_stock":false},{"title":"Large","offer_id":46074717339821,"sku":"AG-103321","price":1.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0543\/0391\/6205\/files\/TigerBarb-Capoetatetrazona_1.jpg?v=1780326424","url":"https:\/\/aquagroup.co.uk\/products\/black-widow-tetra-gymnocorymbus-ternetzi","provider":"Aqua Group","version":"1.0","type":"link"}