I see the point of view u guys are coming from, but to be honest I think California has bigger problems that need worry about that someone owning a ray
Personally, I don't see anything immoral or unethical about owning a prohibited fish-- the laws are aimed at people who might release it. I know I won't release it, so problem solved.
That being said, I definitely would not underestimate the willingness of government agencies to enforce the law, regardless of the seriousness of the offense. There's really no ordinance that Fish and Wildlife enforces that addresses a huge social problem that everyone is terribly worried about. And yet they enforce the law.
My point is that you should maybe rethink the idea of posting about this stuff on a public forum.