Profile photo for LinkedIn. Professional vs industry related?

I'm currently updating my LinkedIn profile and am struggling with what photos to use for my profile/cover photo.

I currentlt have a nice headshot of myself for my profile and my university logo as my cover. My headshot is four years old and I graduated from my school a few months ago, so I think I need to change things up.

I am now working at an aquarium and plan on continuing working in this field, so I want to emphasize that on my page. I have some recent pictures of me in the water and was wondering if it would be appropriate to have a SCUBA photo of myself as my profile picture and a picture of a shark for my cover photo? I know neither are extremely professional, but both are related to the field I'm in.

Thoughts?

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