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Using common tropical fish you can buy at the store. You can compate the Beta and Pleco. The Beta has its jaws at the very top of its head to aid in breating which also make it feed on floating food. The pleco of 'sucker fish' has a circular mouth on the bottom with two pads inside that grind plant material. You could also use the baracudda and all it teeth lol.

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14y ago
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12y ago

They are fitter, faster, bigger and have sharper teeth to enable them to survive.

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Q: What are the adaptations of fish who eat other fish?
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