These have appeared on my live rock. Pictures as good as I can get. They do not look like aptasia to me. I did have a couple which matched and used aptasia F which killed them. These are green under blue light but brown under white light. The tentacles are very small unlike aptasia and they are clustered in a small group. Good or bad? Thanks
![IMG_7861.jpeg IMG_7861.jpeg](https://www.reef2reef.com/data/attachments/3165/3165882-8a3fa30705b8bcb0676ffe8fd75c6df6.jpg)