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How much do you know about sea creatures?
David MacRedmond · 2026-06-01 · via TheJournal.ie

THIS WEEK, BIOLOGISTS confirmed the discovery of a newly identified species of octopus.

The new species, Microeledone galapagensis, is a tiny blue octopus about the size of a golf ball. 

It was first spotted in 2015 during a deep-sea expedition at the Galápagos Islands off the coast of Ecuador. Years later, it has been officially identified as a new species. 

“These are little octopuses that live in the deep sea, and hardly anybody on Earth has ever got to see them,” said Janet Voight, the biologist who described the octopus.

So, today we would like to know: How much do you know about sea creatures? 

What is the fastest fish in the world?

Alamy

The mako shark

Alamy

The swordfish


Alamy

The Atlantic bluefin tuna

Shutterstock

The black marlin

What is the largest fish in the world?

Alamy

The basking shark

Alamy

The great white shark


Alamy

The whale shark

Alamy

The giant oceanic manta ray

True or false: Octopuses have no bones.

Alamy

What kind of fish is this?

Alamy


What kind of whale is this?

Alamy


That's not a real whale. You made it up.

What is a group of dolphins called?

Alamy


How long have horseshoe crabs been around?

Alamy

More than 100 millions years

More than 200 million years


More than 300 million years

More than 400 million years

True or false: Male seahorses get pregnant.

Alamy

In Herman Melville's classic novel Moby Dick, what species is the whale Captain Ahab pursues?

Alamy


True or false: Whales and dolphins have regional dialects.

Alamy

Which of these whale and dolphin species are NOT found in Irish waters?

Alamy


The Atlantic humpback dolphin

The saltwater crocodile is the largest living reptile. They can grow to a length of...

Shutterstock


Answer all the questions to see your result!

You scored out of !

Turtley Awful

Shell of a bad effort.

You scored out of !

What are ewe doing?

Baaaaad.

You scored out of !

Fin-tastic

Flippin' good

You scored out of !

Clever cat

Almost purrfect

You scored out of !

Top dog

Pawsitively amazing!

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