: They have a single gastrovascular cavity (gut) with one opening—the mouth —which serves for both ingestion and the removal of waste.
Тип Кишечнополостные • Биология | Фоксфорд Учебник 7 klass poragrof 14 morskie kishechnopolostnye
: Their most defining feature is cnidocytes (stinging cells) , which contain a venomous capsule and a thread used for hunting and defense. The Three Main Classes : They have a single gastrovascular cavity (gut)
According to resources like the Pobio Study Guide and Obrazovaka , marine coelenterates are categorized into three groups: 7 klass poragrof 14 morskie kishechnopolostnye