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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- Do sea otters use tools?
“Sea otters use rocks to crack open shellfish and may keep a favorite rock in a pouch under their arm.”
Reference: Monterey Bay Aquarium
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Which animal has the densest fur?
Sea otters have the densest fur of any animal, up to about a million hairs per square inch.
Do dolphins use tools?
Some bottlenose dolphins in Shark Bay, Australia, wear marine sponges on their snouts to protect them while digging for food. The habit is mostly passed from mothers to their offspring.