How does pressure change with depth in the ocean?

It rises about one atmosphere every 10 meters

What is a whale fall?

A dead whale on the seafloor that becomes an ecosystem

Deep Sea Trivia Quiz – Names, Facts and Surprises

This deep sea trivia quiz covers the twilight and midnight zones, crushing pressure, anglerfish, giant and colossal squid, bioluminescence, marine snow, whale falls and the Mariana Trench. Ten questions bring names, facts and surprises from the dark depths.

Start Deep Sea Trivia Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Light
Below what depth does sunlight essentially disappear in the ocean?
Lure
Which deep-sea fish uses a glowing lure to catch prey?
Squid
When was a living giant squid first filmed in its habitat?
Colossal
Which squid is the heaviest invertebrate known?
Snow
What is marine snow?
Pressure
How does pressure change with depth in the ocean?
Whale fall
What is a whale fall?
Deepest
Who made the first solo dive to Challenger Deep in 2012?
Fish
Which fish holds the record for deepest fish filmed?
Vampire
What does the vampire squid eat?

Explanations: answer key for all 10 questions

Q1: Below what depth does sunlight essentially disappear in the ocean?
Answer: About 1,000 meters
Below that is the midnight zone.
Q2: Which deep-sea fish uses a glowing lure to catch prey?
Answer: Anglerfish
Bacteria make the lure glow.
Q3: When was a living giant squid first filmed in its habitat?
Answer: 2012
It was filmed near Japan.
Q4: Which squid is the heaviest invertebrate known?
Answer: Colossal squid
It lives in Antarctic waters.
Q5: What is marine snow?
Answer: Falling bits of organic matter
It feeds deep-sea life.
Q6: How does pressure change with depth in the ocean?
Answer: It rises about one atmosphere every 10 meters
Deep animals have special adaptations.
Q7: What is a whale fall?
Answer: A dead whale on the seafloor that becomes an ecosystem
It can feed animals for decades.
Q8: Who made the first solo dive to Challenger Deep in 2012?
Answer: James Cameron
Piccard and Walsh first reached it in 1960.
Q9: Which fish holds the record for deepest fish filmed?
Answer: Snailfish
One was filmed at about 8,300 meters.
Q10: What does the vampire squid eat?
Answer: Marine snow
It is not a true squid.

Deep Sea Trivia Quiz – Into the Dark

The deep sea is the largest habitat on Earth, yet it is one of the least explored. Below about 1,000 meters, sunlight vanishes, temperatures are near freezing and pressure is immense.

Life has adapted in amazing ways. Anglerfish lure prey with glowing lights, giant and colossal squid hunt in darkness and many animals rely on marine snow drifting from above. Whale falls create rich oases on the seafloor.

Exploring the deep requires submersibles and robots. Humans first reached the Challenger Deep in 1960, and new technology keeps revealing new species. Scientists worry about deep-sea mining and want to protect these fragile ecosystems.

What This Quiz Teaches

This quiz is for students and ocean fans exploring the deep sea.

Where sunlight ends
How anglerfish hunt
What marine snow is
Who reached Challenger Deep
What whale falls are

Did You Know?

The average ocean depth is about 3,700 meters.
Giant isopods live in the deep sea.
Some deep fish have no eyes.
Barreleye fish have transparent heads.
Most deep-sea animals produce light.