Serratosagitta bierii

Taxon-Order: 

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Distribution: 
Eastern Pacific Ocean.
Habitat: 
Epipelagic.
Size: 
14-19 mm
Diet: 
Small crustaceans such as copepods.
Useful Facts or Characters: 

The body is rigid and slender, transparent; with small head; two pairs of fins; eye pigment forms a kidney-shaped body; collarette is small. They are hermaphrodites, each bearing paired ovaries and testes.

References: 

http://academic.evergreen.edu/t/thuesene/chaetognaths/eastpacchaets.htm

Alvarino, A. (1961) Two new chaetognaths from the Pacific. Pacific Science 15: 67-77.