Marine Mammals Information Database :Illustrated Guide of Marine Mammals

Fin whale

Scientific Name : Balaenoptera physalus / Japanese Name :nagasu-kujira

Fin whale詳細

Order Cetacea
Suborder Mysticeti
Family Balaenopteridae
Genus Balaenoptera
Species physalus
Subspecies -
Subtype -
CITES Appendix I IUCN RedData Status Endangered
Baleen plates or tooth-Upper jaw 260-470 Baleen plates or tooth-Lower jaw -
At birth At weaning Adult Adult male Adult female
Body length 19.5ft 36.0ft 72.0-79ft - -
Body weight 2t - 60-70t - -
Feature and Habit
The head is very sleek and wedge-shaped. The dorsal fin(as high as 0.6m) is falcated, and locates two-third of the body length from the tip of rostrum. The ridge between the dorsal fin and the flukes is conspicuous. The dorsal side is from gray to dark brown and the ventral side white, but the head color is asymmetrical. The right lower jaw is white, and the left side darker. Fin whales have 260 to 470 baleen plates per side, the plates (shorter than 0.7m) are dark gray, striated with bands of yellow, but those of the right tip are whitish. The 50 to 100 throat pleats are long, and reach to the umbilicus. In general, fin whales are offshore, but some of them come near the shore. They are single or in pods of several whales. They feed in circum polar zones in summer, and breed in low latitude area in winter.
Stranding Record(s) in Japan

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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