Figure 14. Schematic drawing showing differences between Gervais’ (A) and True’s (B) beaked whales. Note the more pronounced melon of True’s beaked whales and the lines in the dorsum of Gervais’ beaked whales.

These lines are not present in all individuals of Gervais’ beaked whales, but have never been observed in True’s beaked whales. The genital white patch shown here in Gervais’ may appear in True’s beaked whales also. Drawing by Vidal Martín (SECAC).