Quiz
Deep Sea Quiz
See-through heads, slime bombs and eyes the size of footballs. 12 questions about the strangest creatures of the deep. How far down can you go?
Deep Sea Quiz
12 questions. Answers come right away, your score at the end.
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Question 1 / 12
Which deep-sea fish has a transparent head you can look straight into?
Its green tube-shaped eyes sit inside a clear, fluid-filled dome – and can rotate to look up or forward.
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Question 2 / 12
When does the blobfish get its famous droopy, melted face?
Down at 600–1,200 m, the huge pressure keeps its jelly body in a normal fish shape. Up here it just sags.
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Question 3 / 12
How does the dumbo octopus mostly get around?
Those “ears” are fins. It flaps, glides and steers with them – like a tiny underwater Dumbo.
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Question 4 / 12
How deep has a dumbo octopus been filmed?
In 2020, in the Java Trench – making it the deepest-living octopus known.
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Question 5 / 12
What does the colossal squid have on its tentacles that the giant squid doesn’t?
Where the giant squid has suckers, the colossal squid has swivelling hooks.
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Question 6 / 12
Which animal has the largest eyes in the animal kingdom?
About 27 cm across – big enough to spot the faint glow around an approaching sperm whale.
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Question 7 / 12
The giant isopod is a supersized relative of which small garden creature?
Same armour and the same trick of curling up – just the size of a house cat.
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Question 8 / 12
What makes the goblin shark’s way of hunting so unusual?
Around 3 metres per second, then they snap back. Scientists call it slingshot feeding.
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Question 9 / 12
What kind of animal is the sea pig?
A plump, pink sea cucumber that walks across the deep seafloor on legs pumped up with water.
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Question 10 / 12
What does the vampire squid actually eat?
Its scientific name means “vampire squid from hell”. Its diet means “gentle snowball maker”.
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Question 11 / 12
A shark bites a hagfish. What usually happens next?
A teaspoon of goo swells up to 10,000 times its size in seawater and clogs the attacker’s gills.
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Question 12 / 12
A giant isopod at a Japanese aquarium famously refused food for how long?
Nobody knows why. In the food-poor deep sea, not eating for ages is a surprisingly useful skill.
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