One fish-bot, two fish-bot, red fish-bot, blue fish-bot.

In a study published Wednesday in the journal Nano Letters, researchers at Sichuan University in China created a fish-bot made of a light-activated material that can absorb microplastics as it swims in water.

The fish-bot is made of a composite material that’s safe for marine environments and physically reacts when a near-infrared light laser is pointed at it.

On top of that, the material the Sichuan University researchers used can repair itself when cut—which means it’s effectively self-healing.