“vidni zajedavec” pomeni zajedavca ali skupino zajedavcev s tako dimenzijo, barvo ali strukturo, ki se jasno razlikuje od ribjih tkiv in je vidna brez optičnih povečevalnih sredstev v dobrih svetlobnih razmerah za vid ljudi;
'visible parasite` shall mean a parasite or a group of parasites which has dimension, colour or texture which is clearly distinguishable from fish tissues and can be seen without optical means of magnifying and under good light conditions for human vision.