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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- What is sea star wasting disease?
“Sea star wasting disease, which began in 2013, killed billions of sea stars along the Pacific coast.”
Reference: NOAA
More from this shelf
Are starfish fish?
Starfish aren't fish, so scientists prefer to call them sea stars.
What is the most contagious disease?
The most contagious disease is the common cold and the most non-contagious disease is gingivitis.