Correct sentences: Corals are many tiny animals growing togethers., Some corals look like objects., Each tiny animal has many arms., Divers must be careful when they swim around the reef., One little octopus can give a poisonous bite., The soft corals do not build reefs., Incorrect sentences: Corals are plants., Corals grow in the same shape., There are not any creatures live in a coral reef., The red fire coral is pretty. it doesn't sting.,

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