Which one of these is known as "Terror of Bengal"?

Question

Accepted Answer

The correct option is 3: Eichhornia crassipes

Eichhornia crassipes is the scientific name for the Water Hyacinth, an extremely invasive aquatic plant that is famously known as the "Terror of Bengal" or sometimes the "World's most problematic aquatic weed." This notorious nickname stems from its introduction to the region of Bengal (historical and modern) during the British colonial era, ostensibly for its attractive mauve flowers. However, once introduced to the nutrient-rich, slow-flowing waters, the plant exploited its astonishing reproductive capacity—primarily through vegetative propagation (stolons/runners)—to cover entire water bodies at an alarming rate, capable of doubling its biomass in as little as two weeks. The resultant thick, floating mats block sunlight and severely impede gas exchange, causing a drastic reduction in dissolved oxygen levels (anoxia). This ecological imbalance leads to the widespread death of native fish and other aquatic organisms, effectively destroying local fisheries and biodiversity, while simultaneously blocking navigation and irrigation channels, thereby causing environmental and economic devastation that has rightfully earned it the title of "Terror of Bengal."

The incorrect option is 1: Bengal Cat

The Bengal Cat is a domesticated hybrid breed of cat, developed by crossing a domestic cat with the wild Asian Leopard Cat (*Prionailurus bengalensis*). This breed is highly sought after globally for its exotic, spotted coat and domesticated temperament, serving as a pet and show animal. While its name is derived from its wild ancestor’s scientific name, which refers to the Bengal region, the Bengal Cat is not an ecological threat or an invasive species. Its existence is due to selective breeding programs, and it is governed by cat registries, not categorized as a major environmental pest.

The incorrect option is 2: Bengal Gram

Bengal Gram is one of the common names for the Chickpea (*Cicer arietinum*), which is an important, widely cultivated legume. It is a staple food crop, essential to the diet and economy of the region, used to make flour (besan) and consumed as a pulse (dal). As an economically useful agricultural commodity that is deliberately grown and harvested, it represents a beneficial resource. Therefore, it is illogical to associate this fundamental food source with the title of an ecological "terror."

The incorrect option is 4: Bengal Monitor

The Bengal Monitor (*Varanus bengalensis*) is a large lizard and a species of monitor, native to the Indian subcontinent. This reptile is a wild animal and is a natural, indigenous component of the South Asian ecosystem, where it plays a role as a mid-level predator. Although the population of the Bengal Monitor may face threats from hunting and habitat loss, it is not an invasive species introduced to the region that subsequently caused environmental havoc. It is part of the native fauna, and its existence is not the reason behind the "Terror of Bengal" nickname.