Answer:
Order Cetacea
Explanation:
The Largest Animal Ever: The Blue Whale
The blue whale (Balaenoptera musculus) is a marine mammal belonging to the suborder of baleen whales.Blue whales belong to the Mammalian Order Cetacea, in the suborder Mysticeti. All baleen whales belong to the suborder Mysticeti, which is Latin for "mustached whales". The blue whale belongs to the rorqual family, Balaenopteridae.
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