Spider Crab Days Food and drink · O Grove, Salnés, Pontevedra Image of O Grove, not of the place itself. Days held at the end of November and beginning of December centred on the spider crab, which reaches the fish markets of O Grove at its best moment of the season, coinciding with the first frosts. Photo: Mário José Martins (CC BY 2.0) What to see and do in O Grove