Oithona similis

Super Group: 
Opisthokonta
Phylum: 
Arthropoda
Sub-Phylum: 
Crustacea
Sub-Class: 
Copepoda
Order: 
Cyclopoida
Family: 
Oithonidae
Genus: 
Oithona
Species: 
similis
Authority: 
Claus 1866