But the girl knew that the plastic clip didn't belong with the urchin, whom she named Harry. So she brought him to get help.
Luckily, Harry was totally fine — the teeth of the hair clip hadn't injured him in any way — but bringing him to have the clip removed at the aquarium probably saved another animal's life.
Sea turtles often dine on urchins. And if a turtle had tried to ingest Harry, he could have died from ingesting the hair clip as well.