Debris can aggregate or collect in bays or offshore, often for a short period before winds and currents shift and disperse the items.  This picture from Hanauma Bay in Hawaii shows the diversity of debris that is in the oceans and can wash up on shore. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/20101018_NOAA-PIFSC-CRED_HanaumaBay.gif/at_download/image">Download</a>) Marine debris can impact important marine habitats. Large debris items, such as derelicts nets, can smother corals, causing harm to the coral organism and the greater ecosystem. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/derelict_net_coral.gif/at_download/image">Download</a>) Fishing nets can become tangled in logs and other debris once they come ashore, making removal very difficult.  This Gulf of Alaska Keeper crew is using knives and hand tools to cut and disentangle the net for removal. (credit Gulf of Alaska Keeper) (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/GoAK_HighRes.gif/at_download/image">Download</a>) Derelict nets can entangle and impede many different kinds of animals, and cause different impacts.  This hawksbill sea turtle in Hawaii was found to be caught in an old fishing net during diver cleanups. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/Hawksbill-GreenSea-Turtle-tangled-net_noaa_720.jpg/at_download/image">Download</a>) Foam debris can break down into very small pieces over time, like this single bead found on a remote beach during a monitoring project.
 (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/IMG_0044.jpg/at_download/image">Download</a>) This photo, taken after a 21-day marine debris removal effort by the Pacific Island Fisheries Service Coral Reef Ecosystem Division, shows 4,781 bottle caps collected from Midway Atoll's shoreline. Most plastic bottle caps are made from polypropylene, also known as plastic #5-- a hard, durable plastic that can be difficult to recycle in some municipalities. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/midway_bottlecaps_PIFSC_CRED_0.jpg/at_download/image">Download</a>)  (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/Hawaii_South_Point_cleanup.jpg/at_download/image">Download</a>) A derelict fishing net washed up on shore in Hallo Bay, Alaska.  Nets like these can come from local fisheries, or from activities thousands of miles away. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/IMG_0327.jpg/at_download/image">Download</a>) ICC volunteers scoop marine debris out of a trash boom in Honolulu. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/trash_boom.jpg/at_download/image">Download</a>) Pre-production plastic pellets can vary in size from 1mm - 5mm. The pellets, made of raw resin, are melted down and used in the manufacturing of the plastic products that we use everyday. When these pellets enter the environment they are frequently found in areas of marine debris concentration. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/nurdles.jpg/at_download/image">Download</a>) Derelict crab pots, once lost, can continue to fish indiscriminately until they become too degraded or colonized to function.  In this study in Alaska, crab pots were shown to continue to fish for up to 7 years after being lost. (<a class="download" href="https://clearinghouse.marinedebris.noaa.gov/media-files/carousel/measuring-derelict-crab-pot-in-duncan-canal-alaska/at_download/image">Download</a>)