Like the Rorquals, they follow the Herring and Mackerel shoals.
A dorsal fin is present in the rorquals but absent in right whales.
Several whales appeared which Captain James Davis reported were "blue whales" (finners or rorquals).
These finners or rorquals are enormous mammals, and on one occasion we were followed by one for several hours.
With this may be possibly compared the double articulation of the single rib (which articulates with the sternum) in the Rorquals.
The cervical vertebrae are free as in Rorquals, and the sternum is quite as in that group.
Structurally it is in a few points intermediate between the Right Whales and the Rorquals.
The ulna and radius in the rorquals are also comparatively longer than in the baleen whales.
The rorquals are sometimes known as fin-whales, or finbacks, because they have an upright fin on the hinder part of the back.
Features by which it may be distinguished from all other rorquals are discussed in the species account.