Clausocalanus arcuicornis

Taxon-Order: 
Calanoida

click on image for more illustrations

Distribution: 
Tropical-subtropical, circumglobal.
Habitat: 
Epipelagic.
Size: 
Female 1.2-1.6 mm; male 1.0-1.2 mm total length.
Predators: 
Fish and others.
Useful Facts or Characters: 

Head is round in both sexes in lateral view.

Natural History: 

Occurs off San Diego year round and can be more abundant in the spring.  Swarms have been reported off Scripps pier.

References: 

http://www.marinespecies.org/copepoda/aphia.php?p=taxdetails&id=104502

http://www.obs-vlfr.fr/~gaspari/copepods_guide/clauso_arcui_fem.htm

http://copepodes.obs-banyuls.fr/en/fichesp.php?sp=592

Frost, B.W., and Fleminger, A. (1968) A revision of the genus Clausocalanus (Copepoda: Calanoida) with remarks on distributional patterns in diagnostic characters. Bulletin of Marine Science 12: 1-235.