Melon is convex, though not bulbous and is defined posteriorly by the indentation at the blowhole. The forehead merges seamlessly to the long, narrow beak. The mouthline is sinusoidal, but not strongly arched.
Dorsal coloration is bluish-gray or slate. Sides are lighter, grading to a white ventral surface. Gray or white scars, visible as linear streaks or round / oval spots, may be distributed irregularly on sides. This pattern is the same for both sexes.
Adult body length ranges between 4.5 to 5.5 m. Recorded maximum body length for adult males and females is 5.5 m and 5.2 m, respectively. Body length at birth is 2.4 m.
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