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2. Freshwater aquarium - Wikipedia

   en.wikipedia.org/wiki/Freshwater_aquarium

   For a tropical fish tank, maintaining a warm environmental temperature ranging between 75 and 86 °F (24 to 30 °C) enables different tropical fish to thrive at different temperatures. [2] Aquarium substrate usually consists of sand or gravel. Aquarium substrate is important for the fishes health, and replicating their natural environment.

3. Pond loach - Wikipedia

   en.wikipedia.org/wiki/Pond_loach

   The pond loach is a common culinary fish in East Asia, raised on a large scale in fish farming. According to FAO, M. anguillicaudatus was 30th on the list of most important species in aquaculture, in terms of total weight produced in 2018. [11] In Korea, chueo-tang (loach soup) is made with pond loach.

4. Common goldfish - Wikipedia

   en.wikipedia.org/wiki/Common_goldfish

   The common goldfish is a breed of goldfish and a family of Cyprinidae in the order cypriniformes. Goldfish are descendants of wild carp from East Asia. [ 1] Most varieties of fancy goldfish were derived from this simple breed. [ 2] [better source needed] Common goldfish come in a variety of colors including red, orange, red/white, white/black ...

5. Fishkeeping - Wikipedia

   en.wikipedia.org/wiki/Fishkeeping

   Most fish and plant species tolerate only a limited range of water temperatures: Tropical or warm water aquaria maintain an average temperature of about 25 °C (77 °F) are much more common, and tropical fish are among the most popular aquarium denizens. Cold water aquaria maintain temperatures below the room temperature.

6. GloFish - Wikipedia

   en.wikipedia.org/wiki/GloFish

   Electric Green GloFish Tetra. The GloFish is a patented and trademarked brand of fluorescently colored genetically modified aquarium fish.They have been created from several different species of fish: zebrafish were the first GloFish available in pet stores, and recently the black tetra, tiger barb, [1] rainbow shark, Siamese fighting fish, X-ray tetra, and most recently bronze corydoras [2 ...

7. Vision in fish - Wikipedia

   en.wikipedia.org/wiki/Vision_in_fish

   Fish are normally cold-blooded, with body temperatures the same as the surrounding water. However, some oceanic predatory fish, such as swordfish and some shark and tuna species, can warm parts of their body when they hunt for prey in deep and cold water. The highly visual swordfish uses a heating system involving its muscles which raises the ...