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Piranhas are "basically like regular fish with large teeth". [19] A few other species may also occur in large groups, while the remaining are solitary or found in small groups. [3] Although popularly described as highly predatory and primarily feeding on fish, piranha diets vary extensively, [3] leading to their classification as omnivorous. [4]
Outside of U.S. federal invasive aquatic species laws, Michigan has some of its own to protect Michigan waters and the Great Lakes. Michigan has a 3,224 mile-long shoreline [8] along the Great Lakes, making it very economically and ecologically dependent and protective of the lakes and the aquatic species that live in it.
This characteristic combined with its large size make it a danger to humans. Piranha's attacks on humans are anecdotal for the most part. The piranha mostly prefers to eat small fish and insects, along with seeds and aquatic plant material. The pygocentrus piraya plays a key role in their ecosystem by regulating the population of other fish [5]
How dark the fish become depends on the local water conditions; fish in Peru appear to be the darkest and may be almost jet black. [2] The maximum recorded fish measurement standard length is 41.5–61 centimetres (16.3–24.0 in), [ 1 ] [ 3 ] although a more normal length is around 32 centimetres (13 in), [ 2 ] and they attain a maximum weight ...
Like most fish, when the wimple piranha feeds on small fish or scales floating in the water, it uses suction feeding. However, to feed on scales attached to fish, it uses ram feeding, where the predator will charge at the fish; the force of this collision actually knocks scales free. The teeth are used to scrape scales from the body.
Researchers tested 12 different species of commonly consumed fish, including bluegill, smallmouth bass and river chub. Bluegill were among the species of fish tested in Michigan.
Portage Lake is a 510-acre lake located near Mendon in the Michigan county of St. Joseph. [1] A glacial-origin lake, it is fed and drained by the Portage River. The lake is variously reported as 37 feet and as 60 feet in maximum depth. [2] [3] The lake was surveyed by the Michigan Department of Natural Resources in 1998.
While the Dietary Guidelines for Americans recommends eating 8 ounces, or about two servings, of seafood (which includes fish and shellfish) per week, it notes that nearly 90% of Americans don't ...