How many hearts does an octopus have?
An octopus has three hearts: two pump blood through the gills and one pumps it to the rest of the body.
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- Can narwhals live in captivity?
“Narwhals don't survive well in captivity.”
Reference: Smithsonian Ocean
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What is a narwhal's tusk?
A narwhal's tusk is actually a tooth that grows through its upper lip, and it's usually found on males.
Can an octopus's arms think for themselves?
About two-thirds of an octopus's neurons are in its arms, so each arm can sense and react somewhat independently of the brain.