The property I own, has the edge of a natural pond on it. The pond used to not be on my property at all except during flooding. But the pond has gotten bigger and there's now a shallow cove that's formed on the edge of my property. I've been fishing it, just the issue is my boomer neighbour is claiming ownership over the entire pond and says I can't fish it and said he's given me a trespassing warning. What are my options?