Kalmar "Family Ostraciidae" tana nufin dangin haraji na kifin ruwa wanda aka fi sani da boxfishes ko trunkfishes. Iyalin Ostraciidae na cikin tsari na Tetraodontiformes, wanda ya haɗa da sauran iyalai na kifaye irin su pufferfish, triggerfish, da filefish. Kifin akwatin yana da siffar su kamar akwatin, wanda ya faru ne saboda dunƙule, faranti na kasusuwa waɗanda ke rufe jikinsu. Ana samun su a cikin ruwaye masu zafi da na wurare masu zafi a duniya kuma galibi ana ajiye su a cikin kifaye saboda kamanninsu na musamman.