Rada Tilly is a small seaside village. I've got recommendation for its park where we can see wolffishes. Comodoro Rivadavia is a larger town close to it.
The park is on the top of the Punta del Marqués cape. It's easy to walk there from Rada Tilly admiring the beautiful landscape. The wolffished are on the bottom of the cape. They lend you field glasses when you pay the entrance to be able to see something. One have small impression of being duped, especially since we can see wolffished very close for free in any fishermen village.
There is no hostel. So you will have to choose a hotel with a private room, which limits choices for small budgets.