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.
Reference: NOAA Fisheries
An octopus has three hearts: two pump blood through the gills and one pumps it to the rest of the body.
There are seven species of sea turtles.
Female sea turtles often return to nest on the same beach where they hatched, possibly using Earth's magnetic field to navigate.