||Flukes are occasionally raised before a dive. Tail stock is very thick. Flukes are elongate with a slight notch in the middle.
||Dorsal fin is stubby and set far back on the body. Less prominent than on fin whales.
||Flippers are blue-gray. Long and slender.
|Shape of head:
||Head is broad and flattened. Narrow in profile. Large splashguard.
||Streamlined body is extremely long. Back and flanks are dark bluish gray, mottled with paler gray blotches. Underside is white or pale blue-gray.
||Tall, narrow blow up to 10m high.
||Usually found singly or in paris, with larger groups at good feeding grounds.
||Approachable, but swims rapidly if disturbed. Youngsters breach, but adults only rarely. When undisturbed, dives of 5-20 minutes may be followed by 12-18 blows at 10- to 20-second intervals.