I don't know what she was after. She had the kind of fork for digging the clammers here in Maine use. There is clamming in Assateague so possible. She has something in her hand but can't see it. If anyone has any idea please chime in.
I guess she's crabbing- the water looks to be the right depth for something like that. I don't know if she'd be too happy about this picture- but it's a good "sneaky" shot.