○○○ arachnid ⪢⪢
Some examples of invertebrates are octopus and squid, insects, arachnids, starfish and sea urchins, jellyfish, crabs and lobsters, clams and many more creatures.
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Pillow English Listening

◎◎◎ invertebrate ⪢⪢
Invertebrates are animals that do not have backbones. ￫ vertebrate
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◎◎◎ vertebrate ⪢⪢
Vertebrates are animals that have spines or backbones.
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