Good friend of mine (and also a college roommate for one year) died a couple years ago and his ashes
were scattered in the surf here by another mutual friend - and a photo of this posted on FB.
As far as I know nothing came of it.
We are a boating community - as in everyone has one - so if someone wanted their ashes scattered at sea
- there wouldn't be any problem arranging it and it sure wouldn't cost anyone anything.
There's also the paddle out memorial for surfers which often includes ash scattering.....
The Not-So-Ancient Practice of Memorial Paddle-Outs