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 giant squid float?
“Giant squid stay buoyant using ammonia in their tissues.”
Reference: Smithsonian Ocean
More from this shelf
When was a giant squid first filmed?
A live giant squid was photographed in the wild for the first time in 2004 and filmed in 2012.
What is an "otter tail"?
The Labrador Retriever has a thick, rounded, tapering "otter tail" that works like a rudder, helping the dog steer while it swims.