Marine Mammals Information Database :Illustrated Guide of Marine Mammals

Sei whale

Scientific Name : Balaenoptera borealis / Japanese Name : iwashi-kujira

Sei whale

Details

Order Cetartiodactyla
Suborder Mysticeti
Family Balaenopteridae
Genus Balaenoptera
Species borealis
Subspecies -
Subtype -
CITES Appendix I IUCN RedData Status Endangered
Baleen plates or tooth-Upper jaw 220-400 Baleen plates or tooth-Lower jaw -
At birth At weaning Adult Adult male Adult female
Body length 15ft 29.5ft 59.0ft - -
Body weight - - - - -
Feature and Habit
The dorsal fin (0.3 to 0.6m) is falcated, and locates two-third of the body length from the tip of rostrum. The dorsal side of their body is gray to gray-blue and the ventral side whitish, sometimes with white round scars. The ventral side of the flukes is dark. Sei whales have 220 to 400 black baleen plates (no more than 0.8m) per side with whitish or grayish brown fringe. The 32 to 60 throat pleats end between the flipper and the umbilicus. They inhabit in offshore waters. They migrate to the higher latitude in summer. They are single or in pods of several whales.
Description
Reference:
Stranding Record(s) in Japan
Map

Marine Mammals Skull Database

A click on the skull thumb nail will bring you to detailed images.


Sex - Reproductive Condition -
Body length - Locality -
Museum No. - Other No. -

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