Quiz on Fluorescent Fish and Ocean Colors

Why do fish appear fluorescent red in the deep blue sea?

• They emit blue light.

• They absorb blue light and emit red light.

• They reflect all colors of light.

• They are naturally red.

What happens to colors as you go deeper underwater?

• Green is the first to disappear.

• Red, orange, and yellow disappear first.

• All colors become more vibrant.

• Colors remain the same.

What is one hypothesis for why fish have fluorescent red eyes?

• To use as red flashlights to see prey.

• To attract mates.

• To scare predators.

• To blend in with the water.

What percentage of fish that eat tiny prey with shiny eyes have fluorescent red eyes?

• About 25%

• About 50%

• About 75%

• About 90%

What is the main reason the ocean appears blue?

• The ocean is full of blue fish.

• Water absorbs red light and reflects blue light.

• The water reflects the sky.

• There are blue pigments in the water.

What is the role of fluorescent fins in fish?

• To blend in with the ocean floor.

• To scare away predators.

• To show off to potential mates.

• To help them swim faster.

Which type of fish is more likely to have a patchy camo-pattern of fluorescence?

• Sit-and-wait bottom predators

• Fish that live near the surface

• Fish that eat large prey

• Free-swimming predators

What is fluorescence?

• When a pigment reflects all colors of light.

• When a pigment absorbs one color of light and emits a different color.

• When a pigment emits the same color of light it absorbs.

• When a pigment absorbs all colors of light.

What is the significance of discovering many fluorescent fish?

• It indicates a new type of fish species.

• It shows that fluorescent coloration is rare.

• It reveals an important type of coloration for understanding fish ecology.

• It suggests that all fish are fluorescent.

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What is bioluminescence?

• When organisms make their own light using chemical reactions.

• When organisms change color to blend in with their environment.

• When organisms reflect sunlight.

• When organisms absorb light and emit a different color.