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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- How long can an octopus guard her eggs?
“One deep-sea octopus was observed guarding her eggs for about 53 months, the longest brooding period known for any animal.”
Reference: Monterey Bay Aquarium Research Institute
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The world's most poisonous octopus
The worlds most smallest octopus, the Blue Ring, is also the worlds most poisonous.
How long is an elephant pregnancy?
Elephants have the longest pregnancy of any land mammal, about 22 months, so a mother elephant is pregnant for almost two years.