Reefs are built by vast colonies of coral polyps - tiny invertebrate animals related to sea anemones and jellyfishes.
(Reefs; are built; by vast colonies of coral polyps - tiny invertebrate animals related to sea anemones and jellyfishes) (coral polyps - tiny invertebrate animals; related; to sea anemones and jellyfishes)
Reefs coral polyps - tiny invertebrate animals
are built related
by vast colonies of coral polyps - tiny invertebrate animals related to sea anemones and jellyfishes
to sea anemones and jellyfishes