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Tiny Fish Use Bacteria to Glow in the Dark - National Geographic

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First read the questions, then watch the video and listen for the correct answers to the questions.

 

1) Where does the video take place?

The Solomon Islands

Hawaii

Tahiti


2) What did the divers see?

Blue bioluminescent lights

A giant shark

A spotted octopus


3) What type of fish did the divers encounter?

Goldfish

Flashlight fish

Salmon


4) Why don't the fish come out when the moon is out?

They live in caves.

They like warm water.

They are very sensitive to light.


5) How do the fish glow in the dark?

They have bioluminescent scales.

They grow bioluminescent bacteria under their eyes.

They eat bioluminescent seaweed.


6) Why do the fish keep their light on while they eat?

So they can see their food.

So they can conserve energy.

So they can hide from predators.


7) How many fish move in a school?

A third of all fish species

Half of all fish species

A quarter of all fish species


8) What are the benefits of schooling?

The fish are safer in a big group because it is harder for a predator to zone in on one specific fish.

The fish can find more food if they work together to hunt.

The fish can easily find a mate and produce more offspring.


9) What is a "blink and run"?

When the fish start swimming in one direction, blink, and then immediately turn in the other direction to evade a predator.

When the fish blink at each other to signal that there are predators nearby.

When the fish turn their lights on and off during a race.


10) What does this recording prove?

Bioluminescent fish are the key to sustainable energy.

It is possible that the deep sea contains billions of bioluminescent fish.

It is possible that coral reefs contain billions of bioluminescent fish.

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