Question

which group of animals are called invertebrates ​

Answer 1

Answer:

The Invertebrates unit explores six groups of invertebrates— poriferans (sponges), cnidarians (such as sea jellies and corals), echinoderms (such as sea urchins and sea stars), mollusks (such as octopuses, snails, and clams), annelids (worms), and arthropods (such as insects, spiders, and lobsters).

Explanation:

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Answer 2

The group of animals who do not have vertebral column, or backbone are called invertebrates. More than 90 percent of all living animal species are invertebrates.

some examples are given here,

Arthropods = Insects, Arachnids,

Mollusks=  Snails,  Squids, and Octopuses

Annelid = Earthworms, Leeches

Cnidarians =  Hydras, Jellyfishes, Sea anemones,