Opalina (Opalina), yak jinsi hayvonhoi soddatarin, parazitest az sinfi qamchinakdorho. Tanaash bargshakl (daroziash to 1 millimetr) buda, bo qamchinakho pushida shudaast. Ektoplazma va andoplazma bo dahho, bazan sadho yadro az ham chudo gashtaast. Surokhii dahon nadorad, bo tavri osmosi gizo megirad.
Bo rohi gayrijinsi (ba du taqsimshavi) va jinsi (kopulyasiya) afzoish meyobad. Dahho namudi Opalina malum ast. Opalinaho odatan dar rudai obkhokiho va bazan mohihoyu khazandaho zindagi mekunand. Prosessi jinsii Opalinaho bahoron dar rudai kaflesak meguzarad.
Sistai Opalina az rudai hayvoni gizodeh (masalan, qurboqa) ba qari obanbor aftoda, ba sifati khurok ba rudai kaflesaki navaztukhmbaromada dokhil meshavad. Dar rudai kaflesak az sista Opalinahoi javon ba vujud meoyand, minbad onho taqsim shuda, gametahoi yakhujayragy khosil mekunand. Gametaho juft-juft omekhta- shuda zigota hosil menamoyand, sipas az zigota Opalinai bisyorkhujayragi paydo meshavad.