crabfish noun2 •(no longer used) A lobster or crayfish. •(no longer used) A freshwater crab found in Southern European rivers, streams, and lakes, Potamon fluviatile or Cancer fluviatilis.Cancer fluviatilis, River crabfish, The ashes of these fishes (as Galen saith) are of wonderfull vertue, by the propertie of their substance, against the biting of a mad dogge. — 1631 formscrabfishes
