The sei whale is a baleen whale found widely in subtropical, temperate and subpolar seas around the world.
Its long, streamlined body is bluish gray to black above and pale underneath. The tall dorsal fin has a hooked shape.
Sei Whales filter copepods, krill and other prey through baleen. They use both skim feeding and gulping of water with prey.
Often seen offshore alone or in small groups, their occurrence can vary strongly between years. Surveys investigate distribution and seasonal movement.
Ship strikes, entanglement, underwater noise and environmental change are concerns. Population monitoring and sound-response research inform conservation.
An extinction-risk assessment has not been added yet.
Threats include ship strikes, entanglement, noise and changing prey conditions. Conservation includes distribution and abundance monitoring, sound studies, noise reduction and stranding response.