Found this on Trip Advisor when I checked this morning:
Manuel M, Manager at Friendly Dolphin, responded to this review
The visitors review was right, the restaurant was closed back then. The reason for temporarily close the restaurant was due to the refurbishing of the streets in the entire old port and the drop in tourism to the city. When the city authorities decided the major renovation of all the streets in the old port, the access to the restaurant was cancelled and that together with the drop in the amount of tourists visiting Peñasco forced the owner to close its doors. However, the roads are new, access is back and the restaurant is back in business welcoming all new and old customers.