EVERY time I went to the beach and many times looking down at the beach from our VRBO, we could see this brown dog (part Lab), going "fetch" with anything anyone would throw for her out in the surf. She LOVES jumping OVER the white-water and/or swimming through it! She would bring her natural beach toy (dried coconut shell, part of a palm leaf, etc.) to any sunbather and mess with them until they'd throw it for her. She was friendly as could be, had a collar but never seemed to "be" with anyone in particular, just whoever wanted to throw her toy for her at the time.