What is special about viperfish teeth?

They are so long they don't fit in its mouth

What do many deep-sea fish do at night?

Rise toward the surface to feed

The Deep Sea Fish Quiz – Facts Worth Knowing

A barreleye fish can look straight up through its own transparent head, and the deep sea fish quiz is full of creatures just as strange. Meet snailfish living over 8 kilometers down, viperfish with needle teeth and lanternfish that glow in the dark waters of the Pacific and Atlantic.

Start the Deep Sea Fish Quiz

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

Question 1 / 10 Time: 150s

Barreleye
What is unusual about the barreleye fish?
Deepest
Which fish has been filmed at about 8,300 meters deep?
Viperfish
What is special about viperfish teeth?
Lanternfish
Which deep-sea fish are among the most numerous vertebrates?
Migration
What do many deep-sea fish do at night?
Blob
Which deep-sea fish was voted the world's ugliest animal?
Gulper
Which fish has a huge mouth that can swallow large prey?
Red
Why do some deep fish make red light?
Tripod
Which fish stands on the seafloor on long fins?
Coelacanth
Which deep-water fish was thought extinct until 1938?

Explanations: answer key for all 10 questions

Q1: What is unusual about the barreleye fish?
Answer: It has a transparent head
Its eyes look up through it.
Q2: Which fish has been filmed at about 8,300 meters deep?
Answer: A snailfish
It was filmed in 2022 near Japan.
Q3: What is special about viperfish teeth?
Answer: They are so long they don't fit in its mouth
They trap slippery prey.
Q4: Which deep-sea fish are among the most numerous vertebrates?
Answer: Lanternfish
They glow with photophores.
Q5: What do many deep-sea fish do at night?
Answer: Rise toward the surface to feed
It is the largest daily migration.
Q6: Which deep-sea fish was voted the world's ugliest animal?
Answer: Blobfish
It looks normal at its natural depth.
Q7: Which fish has a huge mouth that can swallow large prey?
Answer: Gulper eel
It is also called the pelican eel.
Q8: Why do some deep fish make red light?
Answer: To see prey that can't see red
Dragonfish use this trick.
Q9: Which fish stands on the seafloor on long fins?
Answer: Tripod fish
It faces the current to catch food.
Q10: Which deep-water fish was thought extinct until 1938?
Answer: Coelacanth
It was found off South Africa.

The Deep Sea Fish Quiz – Life Without Sunlight

Deep sea fish live in cold, dark waters where sunlight never reaches and pressure is crushing. They include lanternfish, viperfish, anglerfish, dragonfish and snailfish, many of which look very different from shallow-water fish.

To survive, deep sea fish have unusual adaptations. Many produce their own light, some have huge eyes or transparent heads and others have enormous mouths and stretchy stomachs. Some fish migrate up each night to feed, then sink back down by day.

Scientists keep discovering new deep sea fish, such as snailfish filmed at record depths. Deep-sea fishing and mining threaten these slow-growing species, and protecting deep habitats is important for ocean health.

What This Quiz Teaches

Ocean fans and students will enjoy these questions.

How deep sea fish see
Which fish lives deepest
Why they glow
What daily migration is
Which fish was rediscovered

Did You Know?

Orange roughy can live over 100 years.
Hatchetfish have silver sides.
Some deep fish have no scales.
Fangtooth fish have huge teeth.
Deep sea fish often have weak muscles.