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Balaenoptera omurai is known as Omura's whale and is one of the least known species of whales in the world. Now, researchers have studied around 25 individuals in Madagascar, noticing unique asymmetrical pigmentation on the head: A - asymmetrical coloration of the lower jaw B - asymmetrical coloration of the gape C - leading edge of pectoral fin white from tip to shoulder D - apparent absence of lateral rostral ridges E - lightly pigmented blaze originating anterior to the eye F - lightly pigmented chevron
