That's rad.
We had a large model under our boat about 4 or 5 weeks ago. It circled us for 30 minutes. We sent it in to nbc news. Don't mean to steal your thunder. I didn't have a gopro. Wish I did. We figured it was 14' and 1000#.
https://photos.app.goo.gl/NaaWtsS4icqBF4yg9