sentence: Scallops often contain sand when fishermen use dredges.
sentences_after: It can also damage the seabed if they use dredges carelessly. These days scallop dredging is sometimes replaced by scuba diving. However inventors are trying to invent a better dredge. Retrieved April 13, 2008.
concept_name: scallop
headings: Fishing dredge
categories: Fishing