lugworm

noun3

1. •
   Any of several species of large marine annelid worm of the genus Arenicola
2. •
   especially the northern lugworm (Arenicola marina), whose coiled castings can often be seen on beaches at low tide.

   • The lugworms were shorter and lighter, with hispid gills and mucus-coloured tails. — 2022
3. •
   black lugworm (Arenicola defodiens).