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Populations of large predatory fish in the global oceans were estimated to be about 10% of their pre-industrial levels by 2003, [1] and they are most at risk of extinction; there was a disproportionate level of large predatory fish extinctions during the Cretaceous–Paleogene extinction event 66 million years ago. [2]
The tambaqui is the heaviest characin in the Americas (the lighter Salminus can grow longer) and the second heaviest scaled freshwater fish in South America (after the arapaima). [6] It can reach up to 1.1 m (3.6 ft) in total length and 44 kg (97 lb) in weight, [ 5 ] but a more typical size is 0.7 m (2.3 ft). [ 2 ]
Arapaima gigas, also known simply as Arapaima or pirarucu, or paiche, [3] [4] [5] is a species of arapaima native to the basin of the Amazon River.Once believed to be the sole species in the genus, it is among the largest freshwater fish.
A carnivorous fish, it will eat any small fish and invertebrates it comes across. [2] Cannibalism has been recorded. [ 1 ] According to the index of abundance the preferred food items in guts were recorded as; fish (44.75%), semi digested food (22.46%), insect (12%), debris & detritus (6.78%), crustacean (5.93%), fish scale (4.76%), fish egg (1 ...
These fish are best kept with live or frozen feed and they easily outgrow the tank within eight to ten months. An aquarium with the minimum diameter of 6 by 3.5 feet (1.8 by 1.1 m) and 300 US gallons (1,100 L; 250 imp gal) is suggested as a bare minimum but 400–800 US gallons (1,500–3,000 L; 330–670 imp gal) is the best way to go. [ 9 ]
A piranha or piraña (/ p ɪ ˈ r ɑː n j ə ˌ-r æ n /, or / p ɪ ˈ r ɑː n ə /; Portuguese: [piˈɾɐ̃ɲɐ], Spanish:) is any of a number of freshwater fish species in the family Serrasalmidae, [1] or the subfamily Serrasalminae within the tetra family, Characidae [2] in order Characiformes.