Hundreds of California schoolchildren participated Tuesday in an art project on a state beach to raise awareness about pollution in the world's oceans.
Photos of the event, part of Kids Ocean Day, showed the children forming what appeared to be a smiling person throwing trash away in a garbage can while a whale looks on.
Other children spelled out the words "protect what you love" nearby.
The Los Angeles Times reported that the event was hosted by the Orange County Coastkeeper, a local environmental group. The event took place at Huntington State Beach.
"The goal of KIDS OCEAN DAY is to take the powerful message of personal responsibility to the world. The kids are becoming aware of the impact their actions have on the ocean. They see that plastic trash and litter is under the surface of the ocean and entering our food chain. They are learning that what starts with us ends up in the ocean," a statement on the group's website read.
"Kids Ocean Day is dedicated to kids teaching the world about the damage littering on the streets does to the beaches and ocean and the animals that live in the sea," the group added.