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Marine Mammals Information Database ：Illustrated Guide of Marine Mammals
Sei whale
Scientific Name : Balaenoptera borealis / Japanese Name : iwashi-kujira
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 |
| 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. | - |
