Final answer:
The term 'stonebasher' is not a standard taxonomic term, and it is unclear which African electrofish taxon it refers to. Invasiveness of introduced fish species and their role in ecosystem management is a documented issue, leading to ecological challenges when such species become established outside their native ranges.
Step-by-step explanation:
The question concerns why certain fish species are referred to as 'bashers', which is a term not clearly defined in the context of African electrofish taxonomy. However, in terms of invasive species and their impact on ecosystems, which may be relevant, studies indicate that the introduction of fish species to non-native areas can have significant ecological consequences. For instance, the introduction of baitfish species such as Fathead Minnows and Golden Shiners in the United States has led to these species being found outside their native ranges, causing various environmental challenges. In other cases, fish such as Peacock Bass and Northern Pike have been introduced as a management tool to control populations of smaller prey species.
One of the dangers of introducing non-native species, whether for aquarium trade, baitfish, or biological control, is the risk of these species becoming invasive. This often happens when anglers or aquarists release them into local waterways, either knowingly or unintentionally. The African electrofish — or any species termed 'stonebasher' in the informal nomenclature — might receive such a colloquial name due to its habitat or behavior, but without a specific scientific name provided, it's unclear which species is being referred to.