[OrionN]

The lines radiated from the mouth, but at this point it is not clear yet. The shape of the tentacles, the look of the anemone as a whole. However, you really need for him to regain his health first before you have indisputable evidences. Have their biologist looks at the picture and make the decision but don't be too disappoint if they ask you to wait a few days and resend.
Clean clear, in focus picture of the mouth in white light should do it. You can use something to move the tentacles out of the way to show them what you need for them to see.