The Grass Carp (Ctenopharyngodon idella) is a large, herbivorous fish native to Asia but introduced globally for aquatic weed control. These fish can grow over 4 feet in length and weig... The Grass Carp (Ctenopharyngodon idella) is a large, herbivorous fish native to Asia but introduced globally for aquatic weed control. These fish can grow over 4 feet in length and weigh up to 100 pounds. They primarily consume aquatic plants, making them useful for managing overgrown vegetation in waterways. However, their appetite can also lead to habitat degradation if not carefully managed, as they might deplete native vegetation crucial for other species.Click here to read more about Grass Carp.