The weird little whales that hide within a cloud of their gut fluid

One of the most bizarre defense mechanisms among mammals is found in the two exant members of the genus Kogia, the pygmy sperm whale (Kogia breviceps) and the dwarf sperm whale (Kogia sima). This dolphin-sized relatives of the enormous sperm whale (Physeter macrocephalus) evolved a method to confuse predators which is…well… special.

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