The life‐cycle of the abundant and frequent calanoid copepodAcartia(Paracartia)latisetosais not completely known. Eggs of three morphological types and at least two biological meanings were obtained from adult specimens under laboratory conditions. Two types (≪smooth≫ and ≪brush‐like≫) were subitaneous. A third, ≪spiny≫, type rested for at least 50 days before hatching and was considered diapausal. It was suggested that the production of these different types of eggs helpsA. latisetosato overcome periodic, or unpredictable, crises typical of the confined brackish environments where this species is abundant. This is the first record of a resting stage inA. latisetosa.