What you have there is a TSA time warp- Google images #3, #5. The color and then the ‘notch’ in the yellow is the distinguishing characteristic.
I’ve seen them offered more recently by cherry corals (or someone else) as time travelers but didn’t come up with anything on a Google search.
Outside chance it’s a morphed circus zoa but the notch leads me to believe time warp to be correct. I can grab a pic of mine if you’d like a pic for reference.