Cetaceans
breathing method:
via lungs, stores oxygen in muscles
size and weight:/
largest cetacean (blue whale): maximum 33 meters and 170,000 kilograms
smallest cetacean (porpoise): maximum 1.90 meters and 60 kilograms
communication:
baleen whales low-frequency sounds
toothed whales echolocation
enemies:
humans (hunting, pollution, noise pollution) and diseases
food:
baleen whales small marine animals, plankton and small shellfish
toothed whales fish, cuttlefish
- Dut: walvisachtigen
- Eng: cetaceans (whales, dolphins, porpoises)
- Fren: cétacés (baleines et dauphins)
- Ger: Walartige
- Lat: Cetacea
- Dan: Cetacean

Cetaceans
Cetaceans is the official name for the whale family. When you hear the word 'whale', you usually picture a giant animal. However, porpoises which are only 1.5 meters long also fall under cetaceans. The predecessors of the cetaceans lived on land. During the Tertiary period (around 50 million years ago), a group of predator-like mammals moved to coastal regions. They slowly adapted to swimming in the sea. They were animals without back legs, but had fins and a wide flattened tail.
- Teeth or seaves
- Distribution in the North Sea
- Dolphin rehabilitation
- Exceptional cetaceans along the Dutch coast
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