Mysticeti
The 'Mysticeti' The scientific name comes from the Greek word 'mystidos', which means 'unknowable'. The other being the Odontoceti, or toothed whales. They are often called 'baleen whales', or 'whalebone whales' or 'great whales'. Baleen whales have baleen plates for filtering food from water, instead of having teeth. This makes them different from the Odontoceti.