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.
Manta rays have one of the largest brain-to-body ratios of any fish.
Male Rottweilers typically weigh between about 95 and 135 pounds, making them powerful, heavily muscled dogs that need early training and socialization.