Characteristic intense dark green dorsally with pale dorsal cirri. One pair of dark red eyes. 180 mm total length, 4 mm body width.There may be another five Eulalia species. A revision is pending.

This dark green worm is found on the intertidal, usually associated with shell material, especially oysters.

Active intertidal predator or scavenger, sometimes seen in the open crawling across the surfaces if damp or weed covered.

Glasby, C.; Read, G. (2009). Polychaeta, Myzostomida. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp http://www.annelida.net/nz/Polychaeta/Family/Phyllodocidae/eulalia-microphylla.htm 17/02/14 Brett, CD, 2006. Testing the effectiveness of the mt DNA Cytochrome c oxidase subunit 1 (COI) gene locus for identifying species of Polychaete worm (Polychaeta: Annelida) in New Zealand, Unpublished MSc thesis, University of Waikato.