Cephalopods
15 questions tagged Cephalopods — spanning every one of the seven Ws.
Why do octopuses squirt ink?
Octopuses release ink as a defense, creating a cloud that confuses predators and gives the animal time to escape. Some ink can also dull a predator’s sense of smell.
Which marine invertebrate has the largest known eyes?
The colossal squid has the largest known eyes of any animal, with eyes up to about 27 centimeters across. These enormous eyes help it detect faint light in the deep ocean.
What is a giant squid?
A giant squid is a deep-ocean cephalopod that can grow to enormous lengths. It has the largest known eyes of any animal.
What is a vampire squid?
A vampire squid is a deep-sea cephalopod that uses webbed arms and light organs to survive in low-oxygen waters. Despite its name, it does not suck blood.
When was the giant squid first scientifically described?
The giant squid was first scientifically described in 1857.
When was the colossal squid first scientifically described?
It was first formally described in 1925.
When was the nautilus first scientifically described?
The chambered nautilus was described in 1758.
When was the blue-ringed octopus first scientifically described?
It was first described in 1929.
When was the giant Pacific octopus first scientifically described?
It was first scientifically described in 1849.
Which octopus is the largest by mass?
The giant Pacific octopus is the largest octopus by mass, with large individuals weighing around 50 kilograms or more.
Which sea creature has the largest eyes?
The giant squid is famous for having the largest eyes of any known animal, with eyes that can be about 25 centimeters across.
Whose name is attached to the giant squid’s modern scientific description?
The giant squid was formally described in the 19th century by naturalists working from specimens and stranded remains. The animal became one of the ocean’s most famous deep-sea mysteries.
How do octopuses change color and texture so quickly?
Special skin cells let octopuses expand pigments and reflect light, while muscles alter the skin’s texture.
How do giant squid survive in the deep ocean?
They rely on large eyes, powerful tentacles, and a deep-sea lifestyle that helps them detect prey in darkness.
How do octopuses squeeze into tiny spaces?
Octopuses have soft, flexible bodies with no rigid internal skeleton. Because they can compress their mantle, they can fit through openings barely larger than their beak.