Adults of the calanoid copepod Acartia bifilosa and the varieties inermis and intermedia are examined and described. This study brings to light discrepancies in the available keys to all these forms. Individuals previously reported and also deposited

The developmental stages and increase in length of Acartia bifilosa, a dominant planktonic copepod in Kyeonggi Bay, Yellow Sea, Korea, were investigated in a laboratory. Adults laid eggs at a rate of 2.5 eggs day−1 female−1 and up to 97% of eggs hatched.

Hydrobiologia, ISSN 0018-8158, vol. 292/293, 415-422 The seasonal response of the two most abundant calanoid copepods of the northern Baltic Sea, Acania bifilosa Giesbrecht and Eurytemora affinis (Poppe), to abiotic factors was studied in Tvärminne, the