rascas

To be precise, you take a langouste, three rascas (an edible but second-rate fish), a slice of conger, a fine 'chapon,' or red rascas, and one or two 'poissons blancs' (our grey mullet, I take it, would be an equivalent).

From a Cornish Window A New Edition Arthur Thomas Quiller-Couch 1903

The marvel to me is that no missionary has acclimatised this wonderful dish upon our coasts, where we have far better fish for compounding it -- red mullet, for instance, in place of the rascas; and whiting, or even pollack or grey mullet, in place of the 'poissons blancs.'

From a Cornish Window A New Edition Arthur Thomas Quiller-Couch 1903