brandling

noun2

1. •
   A small, red earthworm, Eisenia fetida, used for bait in freshwater fishing.

   • And you also find another kind of worm called a brandling, which is striped and smells like an earwig, and which is very good bait for perch. — 1939
2. •
   The young or parr of the salmon, so named from its markings being, as it were, branded.