marine life

Looks like a shrimp of some sort. It’s it coral safe is the question. Don’t know how it got in the tank but it’s there. Found in the refugium Photos of video doesn’t play. Main question/issue why happens if it populate the tank

I made a video of colorful little marine life that I found on dives in the Lembeh Strait, Indonesia, and at Anilao in The Philippines. There is a subtitle track containing the common and scientific names of all the marine life. Some of the species are exotic and rare. Feedback is welcome.