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sleeping sperm whales

Cetacean sleep

Cetaceans, or whales and dolphins, have a pretty unique way of getting some shuteye. These marine mammals actually only rest one half of their brain at a time when sleeping, in what is known as unihemispheric slow-wave sleep. While one hemisphere of the brain rests, the other remains alert. The hemispheres are alternated between sleep […]

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Unusual_coloration_in_Cetaceans

Unusual coloration in Cetaceans.

When identifying a species one of the most commonly used characteristics is their colouration. To have unusual skin fur or feather colouration is rare in both humans and animals and can lead to misidentification. Skin, fur and feather colouration is produced by several different pigments, the main one being melanin, and when this is partially […]

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