Claim: The blue whale is a whale.
Evidence: The blue whale -LRB- Balaenoptera musculus -RRB- is a marine mammal belonging to the baleen whales -LRB- Mysticeti -RRB-.
Baleen whales -LRB- systematic name Mysticeti -RRB- , known earlier as whalebone whales , form a parvorder of the infraorder Cetacea -LRB- whales , dolphins and porpoises -RRB-.