Natural Markings
In addition to these man-made and applied tags, variations in natural markings and unusual appearances may be used to identify individuals and herds on repeated encounters. Although many species of cetaceans are characterized by changes in color pattern with age, individuals occasionally differ radically in their coloration from their fellows (App. Figs. [A9], [A10]). In addition, individuals are sometimes seen with unusually shaped dorsal fins or scarring patterns (App. Fig. [A11]). These unusually marked animals should stand out in repeated encounters and can be a help in identifying a herd from one encounter to another.
Obviously, this list of tags and anomalous markings is not exhaustive. New marks may be developed at any time. The discussion is intended to make the reader aware of the value of information on natural or man-made marks in studies of cetacean natural history. Your cooperation will perhaps help us to unravel some of the mystery surrounding the distribution and movements of porpoises, dolphins, and whales.