The Ultimate Octopus Quiz

A female pillow octopus is 40,000 times heavier than a male pillow octopus.

The male octopus has sperm in one of his arms, which he actually tears off and gives to a female octopus. Talk about a romantic gift!

An octopus feels like the inside of your cheek. An octopus is actually not slimy.

Octopuses arms are very versatile. They use their arms for moving around, feeling and tasting.

Octopuses belong to the phylum mollusca. Clams, snails and slugs are their closest relatives.

Cephalopod means "head-footed”. Therefore, octopuses are given the name cephalopod because their arms protrude directly from their head.

Many people make the mistake by saying octopuses have tentacles. In reality, octopuses only have arms, which they use to do just about everything.

The mantle is a muscle-like structure where all of the octopus's organs are found, including the heart, digestive system and reproductive glands.

Chameleons can learn a thing or two from octopuses. Octopuses have sophisticated camouflage abilities.

Octopuses have blue blood, because a copper-containing protein binds to oxygen in their blood.

An octopus's blood does a bad job of circulating oxygen. Therefore, octopuses need three hearts to ensure good oxygen circulation.

Chromatophores are pigmented cells that are found all over an octopus's body. These cells contain three colors and allow the octopus to blend in with its surroundings.

The color-changing quality of an octopus is controlled by the nervous system. This means an octopus can change color in less than a second.

The octopus also has numerous iridophores, which are reflective cells, all over its body. These reflective cells help accentuate the camouflage effect.

The anatomy of an octopus's eyes is similar to the human eye. Octopuses can easily see their prey and predators.

An octopus may have a small brain, but it has a rather complex nervous system.

Octopuses are very strong. Their arms are composed primarily of muscle, giving them the ability to tear through plexiglass.

Octopuses hunt for their food only at night and relocate their home every few weeks.

Octopuses are known for being lazy, spending most of their time immobile in their den.

Octopuses generally have a very short lifespan, about three to five years.