We searched for a restaurant serving moules and, surprisingly struggled until we found Le Bouchot. They were able to take our party of 8 around 7.30 on a Saturday, and within 15 more minutes the restaurant was full.
AT EUR 9 per large glass the beer was pricey, and the wine was priced around the same as in a UK restaurant. Those having the moules said it was the best they'd had, whilst the others having a range of seafood (one Fruit de mer, some sea bass, some calamari) all raved at how good the food was. There was a small number of non-seafood dishes which also were great (especially the chicken with a local cheese sauce).
Service was very friendly, if a little slow (but then it was full).
With two beers each, a couple of bottles of wine and two courses for the eight of us the bill worked out at EUR 45 per person. Not cheap, but worth it for the excellent food. We would have gone back the following night - but it's closed on Sundays.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.