Leech

The leech has a large black body with a tinge of green on its abdomen. A leech is practically universal fishing bait. Using it as bait you may catch such fish as perch, chub, ide, common bream, small bream, small catfish, pike, roach, white bream, burbot, gudgeon and chinese sleeper. Leeches inhabit various areas of water bodies, where the bottom is covered with a thick layer of silt or clay. Black leech feed on blood, it also consumes various worms, insect larvae and other small organisms.