Kalmar "Class Ascidiacea" tana nufin nau'in taxonomic na marine invertebrates, wanda aka fi sani da ascidians ko squirts na teku, waɗanda mambobi ne na phylum Chordata. Ascidians suna da siffar jikin jiki mai kama da jakunkuna da tsarin bututun ruwa na musamman, wanda ake amfani dashi don ciyarwa da numfashi. Class Ascidiacea wani ɓangare ne na babban subphylum Tunicata, wanda ya haɗa da wasu nau'ikan riga kamar su salps da doliolids.