South American piscivorous fishes adapt nicely, given the right foods and conditions.
Predatory fishes will always be popular with advanced aquarists, but many of them require a great amount of care and attention. Their aggression toward members of their own species, special water requirements and large adult sizes make them demanding pets; they are not often considered ideal for beginners.
The “freshwater barracudas” are a group of South American predatory fishes that greatly resemble marine barracudas, our native gars and marine needlefishes. While all species grow large in size — often to lengths of more than 1 foot as adults — they are often easy to keep and make ideal pets for those with aquaria specially set up for predatory fishes.
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