Once upon a time, in the ocean depths, there lived a tiny phytoplankton named Phyto. Phyto was known for his unique ability to glow brightly at night due to bioluminescence.

One day, Phyto decided to explore the ocean and travel to the euphotic zone where the sun's rays could reach. But on his way, he met a group of zooplankton who lived in the disphotic zone, where it was always dark.

The zooplankton were fascinated by Phyto's glowing and asked him how he managed to do it. Phyto proudly explained that he produced chlorophyll during the day to store energy from the sun and then used that energy to light up the ocean at night.

The zooplankton were amazed and asked Phyto to show them how it was done. So, Phyto invited them to follow him to the euphotic zone to see how he produced chlorophyll.

As they made their way to the top of the ocean, Phyto started to glow brighter and brighter, lighting up the way for the zooplankton. When they finally reached the euphotic zone, the zooplankton were amazed by the brightness of the sun's rays and how Phyto was able to absorb its energy.

From that day on, the zooplankton and Phyto became the best of friends and would often travel together through the ocean depths, lighting up the water with their bioluminescence. The end.

Reflections

• What is bioluminescence and how does Phyto use it?
• Why did the zooplankton live in the disphotic zone instead of the euphotic zone?
• How did Phyto produce chlorophyll and what was its purpose?
• What happened when Phyto and the zooplankton reached the euphotic zone?
• Do you think the zooplankton learned anything from Phyto on their journey?