Don't have the slightest clue what this is... first time seeing it, pops it head(?) out and pulls it back in when a fish swims too close.
Here is a video on google photos. https://photos.app.goo.gl/3iFE8PCGS7nD7Zng7
I didn't add it directly here because most sights degrade the quality too bad.
Thanks for any help, sorry I was unable to get any better photos...

Here is a video on google photos. https://photos.app.goo.gl/3iFE8PCGS7nD7Zng7
I didn't add it directly here because most sights degrade the quality too bad.
Thanks for any help, sorry I was unable to get any better photos...

