Raspberry peanut butter mead, this happened after racking into tertiary. Primary and secondary had raspberries freefloating in the container, so it miiiight just be floating bits of raspberry. When I shake it up, they briefly sink and float back up.
Peanut butter ? Its not because you can do something that you should...
What does it smell? Nice subtle yeast odor or an odd/off odor?
It doesn't look like mold, but it could be unwanted bacteria biofilms which should smell bad...