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 do scientists identify manatees?
“Scientists identify individual manatees by scars from boat propellers.”
Reference: US Geological Survey (USGS)
More from this shelf
What are manatees most closely related to?
The manatee's closest living relatives are elephants.
How do scientists identify individual manta rays?
Each manta ray has a unique pattern of spots on its belly.