What is the meaning of Nerka?

Used as a specific epithet; sockeye salmon.

A sockeye salmon.

kidney (organ in the body that filters the blood, producing urine)

kidney dish, emesis basin (shallow basin with a kidney-shaped base and sloping walls used in medical and surgical wards to receive soiled dressings and other medical waste)

fanny pack, bum bag (small fabric pouch secured with a zipper and worn at the waist by a strap around the hips)

sockeye salmon, red salmon, blueback salmon (Oncorhynchus nerka)

Source: wiktionary.org