All images have been done by Bruno Coudoin with the gimp except:

Image ID : nur00523, National Undersearch Research Program (NURP) Collection
Location: Tropical Atlantic Ocean, Florida Keys.
Photographer: D. Kesling
Credit  : OAR/National Undersea Research Program (NURP); University of North Carolina at Wilmington
Web     : http://www.photolib.noaa.gov/nurp/nur03006.htm

Image ID: nur03006, National Undersearch Research Program (NURP) Collection
Location: Florida Keys
Credit  : OAR/National Undersea Research Program (NURP)
Web     : http://www.photolib.noaa.gov/nurp/nur03006.htm

Image ID: nur03505, National Undersearch Research Program (NURP) Collection
Credit: OAR/National Undersea Research Program (NURP)
Web     : http://www.photolib.noaa.gov/nurp/nur03505.htm

Image ID: nur03010, National Undersearch Research Program (NURP) Collection
Credit: OAR/National Undersea Research Program (NURP)
Web     : http://www.photolib.noaa.gov/nurp/nur03010.htm

Image ID: nur03011, National Undersearch Research Program (NURP) Collection
Credit: OAR/National Undersea Research Program (NURP)
Web     : http://www.photolib.noaa.gov/nurp/nur03011.htm

Image ID: nur03013, National Undersearch Research Program (NURP) Collection
Credit: OAR/National Undersea Research Program (NURP)
Web     :  http://www.photolib.noaa.gov/nurp/nur03013.htm

difficulty_star.png by Pascal Georges