About 900 local elementary school students came together on Friday morning at South Mission Beach to share a message, figuratively and literally.
After spending time cleaning litter from the sand, the students joined together to create a striking image that read "Sea Change" with a crab design.
The stunning formation was spotted by the NBC 7 news chopper just before 11 a.m.
The event was part of the annual Kids' Ocean Day Event in San Diego, which is one of six cities nationwide that participate to encourage students to become lifelong stewards of marine life.
The event is organized locally by I Love A Clean San Diego (ILACSD), whose organizers estimate there are 5 trillion pieces of plastic in the world's oceans.
The demonstration aims to encourage everyone to keep oceans clean.
Sarah Buchholz, spokeswoman for ILACSD, said the students love taking part in something this large-scale and creative.
"One of our students said she had never done something like this before," she said.