Delicious Zeeland Mussels, dried in Urk. The mussels are approximately 1 x 1 cm and weigh 1 to 2 grams, so they are great for use as trainers. Something different for the fish enthusiast. product analysis 100% mussels; protein 73%, fat 2.2%, moisture 6.8%, ash 12%, fibers 0.4%, omega 3 and 6 0.35%. Feeding fish contributes to a healthy coat and flexible joints.