Question

please explain these three classes of phylum Cnidaria​

Answer 1

Answer:

1)a class of coelenterates which includes hydras and Portuguese men-of-war. Many of them are colonial and some kinds have both polypoid and medusoid phases.

2)a class of marine coelenterates which comprises the jellyfishes.

3)a large class of sedentary marine coelenterates that includes the sea anemones and corals. They are either solitary or colonial, and have a central mouth surrounded by tentacles..

Explanation: