Common name: Polychaetes

Polychaetes, commonly known as bristle worms, are a diverse class of annelid worms characterized by segmented bodies with a pair of paddle-like parapodia on each segment, which bear numerous bristles, or chaetae. These organisms play a crucial role in the marine ecosystem as detritivores, helping to break down and recycle organic matter. In reef aquariums, small species of polychaetes can be beneficial by consuming detritus and aerating the substrate, but larger, predatory types like the fireworm can harm other invertebrates.

1. 
   Common name: Clam Worm

   Scientific name: Alitta virens
2. 
   Common name: Social feather duster

   Scientific name: Bispira brunnea
3. 
   Common name: Banded Fanworm

   Scientific name: Bispira melanostigma
4. 
   Common name: Social Feather Duster

   Scientific name: Bispira tricyclia
5. 
   Common name: Feather Duster Worm

   Scientific name: Bispira viola
6. 
   Common name: Twin fan worm

   Scientific name: Bispira volutacornis
7. 
   Common name: green spoon worm

   Scientific name: Bonellia viridis
8. 
   Common name: Green-leaf worm

   Scientific name: Eulalia viridis
9. 
   Common name: Bristle Worm

   Scientific name: Eunice norvegica
10. Common name: Nebulous Terebellid Worm

    Scientific name: Eupolymnia nebulosa
11. Common name: St. Joseph's Cardinalfish

    Scientific name: Eurato sanctijosephi
12. 
    Common name: Common Fireworm

    Scientific name: Eurythoe complanata
13. 
    Common name: Tangled Tubeworm

    Scientific name: Filograna implexa
14. Common name: Filogranella elatensis

    Scientific name: Filogranella elatensis
15. 
    Common name: Bobbit Worm

    Scientific name: Glycera unicornis
16. 
    Common name: Sponge Worm

    Scientific name: Haplosyllis spongicola
17. 
    Common name: bearded fireworm

    Scientific name: Hermodice carunculata
18. 
    Common name: Scale Worm

    Scientific name: Lepidonotus clava
19. 
    Common name: Spagetti worm

    Scientific name: Loimia medusa
20. 
    Common name: Red Feather Duster

    Scientific name: Myxicola infundibulum
21. Common name: Slender Ragworm

    Scientific name: Nereis pelagica
22. 
    Common name: Mussel Worm

    Scientific name: Nereis vexillosa
23. 
    Common name: Fireworm

    Scientific name: Oenone fulgida
24. 
    Common name: Bristle Worm

    Scientific name: Phyllodoce lamelligera
25. 
    Common name: hard tube coco worm

    Scientific name: Protula bispiralis
26. 
    Common name: Mediterranean Fanworm

    Scientific name: Sabella fallax
27. 
    Common name: feather duster

    Scientific name: Sabellastarte magnifica
28. 
    Common name: Indian feather duster worm

    Scientific name: Sabellastarte spectabilis
29. 
    Common name: Coral worm

    Scientific name: Salmacina dysteri
30. 
    Common name: tubeworm

    Scientific name: Serpula vermicularis
31. 
    Common name: Christmas Tree Worm

    Scientific name: Spirobranchus corniculatus
32. 
    Common name: Christmas Tree Worm

    Scientific name: Spirobranchus giganteus