Scardinius Erythrophthalmus

Cyprinidae

Cypriniformes

Lake, River, Backwater

2 - 5 pounds

14" - 24"

Rudd 

Also Known As: Pearl Roach, Common Rudd  

Rudd (Scardinius erythrophthalmus) Fish Description

The common Rudd, or otherwise known as a Pearl Roach, has bright red pectoral, pelvic, and anal fins. However, the Rudd’s dorsal and tail fins appear to be more of a brown to bright red gradient. It appears to be a stocky and deep-bodied fish with a slightly protruding lower lip. The tail fin is a bit forked, forming a deep letter “v”. While the Rudd appears to be silvery-white, the top (dorsal) portion of its body appears to be dark olive green.

While they do look like a Minnow, they can be told apart by their scaled keels. These look like a line between their pelvic fins. However, the Rudd looks more similar to the Golden Shiner and requires a closer look to tell them apart. To tell them apart, one has to count the number of rays on their fins. Rudds have around 9-11 rays for their dorsal fin and 10-11 for their anal fins. Also, to take note more of the color on their fins. The Rudd’s fins are red whereas the Golden Shiner has golden fins.

 

Rudd Diet and Size

When young, Rudds are carnivorous. They eat smaller fish and aquatic insects. Sometimes, they also feast on zooplankton. However, as they grow older, Rudds become vegetarian and prefer aquatic plants as their main source of nutrients.

Rudds grow to an average of 25 cm but have been reported growing to 45-50 cm.

 

Interesting Facts about the Rudd

  • Rudds are considered an invasive species especially when they breed with a Golden Shiner.
  • Adult Rudds are usually responsible for the destruction of vegetation that other fish use as their habitat.
  • Some people have used Rudds as baitfish.
  • It’s illegal to keep or buy Rudd.
    • Anglers are often instructed that if they do keep a Rudd, it’s best to kill it.
    • Some people do keep its hybridized version, the Golden Rudd.
  • Rudds are not picky about water. They can adapt anywhere even if the water is of poor quality.
  • An average Rudd’s lifespan is around 17 years.
  • Rudds eat a lot! They eat up to 40% of their body weight.
  • Rudds are different from Roaches. The best way to tell is the position of their lip. Roaches are bottom feeders whereas Rudds like to feed on the surface.

 

Rudd – Fishing Techniques: How to Fish for a Rudd

Choice of bait when fishing fo