A French scalloper is dredging for a catch of the shellfish. The method of trawling is by use of a dredge in the form of a metal scoop. Early dredges had teeth called tynes which would plough up the seabed and dig up the scallops, clams, oysters or crabs. The method also hauls up predators of the scallop, octopus, whelks and starfish. Dredging is a controversial method of fishing owing to the damage done to the seabed which has been found to take a long time to recover.