Vocabulary : invertebrates, vertebrates, cnidaria, cnidae, hard corals, stony corals, soft corals, horny corals The small coral polyp animals that make up coral reefs belong to a scientific group of invertebrates called Cnidaria .
(The small coral polyp animals; make up; ) (coral reefs; belong; to a scientific group of invertebrates) (a scientific group of invertebrates; called; Cnidaria)
The small coral polyp animals coral reefs a scientific group of invertebrates
make up belong called
to a scientific group of invertebrates
Cnidaria