Grass carp (ctenopharyngodon idella) is common addition to many ponds as it has a reputation for eating blanket weed. Sadly this is only partially true. They will eat all aquatic vegitation, but much prefer Koi pellets and sticks. These fish can also grow in excess of 3ft! Grass Carp are also incredibly good jumpers.
Grass Carp have been released as a natural aquatic vegetation control in many countries, but this requires large numbers to make an impact.
Grass Carp are found in Normal and Albino Varieties.