Langoustier is a boat equipped for the fishing of crayfish. For fishing distance, these last exceed 50 barrels. The most part are equipped with a fish tank put in the centre and supported in constant communication with the sea. The modern Langoustier is 30 meters long and can load living crayfishes from 30 to 40 tonnes in the fish tank. The term Langoustier also indicates nets in the form of deep scales to take crayfishes. Long of around thirty meters, they are vertically wet on the fund of sand surrounded with rocks. They are installed during the day and raised the following day.