Before revision: This form of dredging removes substrate and fauna specifically from the marine environment.250x250px|Hopper dredger ship Eke Möbius outside of Cuxhaven, Germany History Edward Forbes would lay out the dredged material on the deck to examine, preserve and study it.
After revision: This form of dredging removes substrate and fauna specifically from the marine environment.250x250px|Hopper dredger ship Eke Möbius outside of Cuxhaven, Germany History Edward Forbes Edward Forbes would lay out the dredged material on the deck to examine, preserve and study it.