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 sea stars regrow arms?
“Sea stars can regrow lost arms, and some can regrow a whole body from a single arm.”
Reference: NOAA
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Are starfish fish?
Starfish aren't fish, so scientists prefer to call them sea stars.
Can the liver regrow?
The liver can regenerate. When part of it is donated, both the donor's liver and the transplanted portion can grow back to nearly full size.