Came with four adults and seven children from 5-15. All enjoyed the museum and sea world which very well presented. Had lunch in the restaurant after and they deduct price of entry from the bill (so keep hold of receipt from the entry). Not cordon bleu but ok food. It's a set menu of three courses (three choices for each) for €20 per adult and €10 for kids. They also provide bread rolls, bottled water and very nice rioja as part of the deal. No indication that there is any limitation on these either 👍. The tables very nicely laid with table cloths and a great view all round of the bay of Santander.

This was a great visit. There were very few people visiting so the venue felt very safe. Clear instructions from the staff on which areas to visit and in which order. The upstairs was a wonderful journey of the history and very educational. The aquarium was brilliant, as there was a member staff in the tank itself feeding the fish which we captured on video. A really pleasant trip and great value at 8 euros for an adult.

This was the highlight of our trip to Santander! In a city that honestly doesn’t have too much to offer apart from maybe the food, this museum really lifted our spirits. The exhibit is well laid out with some very clever and thoughtful exhibition set pieces. For example, in the exhibit showing what it would have been like to have been on board one of the ships, they had the cannons aiming out towards some small windows so that you could see the real sea outside, making it feel very immersive. The aquarium was absolutely delightful with displays of local fish and jellyfish. Admittedly it is relatively small and the exhibits can’t possibly compare with the likes of Okinawa or Singapore, but for a small museum, they had really made an effort, which is all one can ask for. Some reviewers mentioned that they were asked not to take photos. We were not told this - in fact in the aquarium we were told we could take photos as long as we didn’t use the flash. Overall, a lovely way to spend a couple of hours on a rainy day.