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Pacific Reef Assessment and Monitoring Program: Towed-diver Surveys of Benthic Habitat, Key Benthic Species, including Marine Debris Sightings, of the U.S. Pacific Reefs from 2000 to 2012

Published by Pacific Islands Fisheries Science Center | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 02, 2026 at 11:20 PM | Dataset Last Updated: January 01, 2016 at 12:00 AM
The towed-diver method is used to conduct benthic surveys, assessing large-scale disturbances (e.g., bleaching) and quantifying benthic components such as habitat complexity/type and the general distribution and abundance patterns of live coral, CCA, macroalgae, and macroinvertebrates. Surveys are conducted in the Hawaiian and Mariana Archipelagos, American Samoa, and the Pacific Remote Island Areas as part of the NOAA National Coral Reef Monitoring Program (NCRMP). A suitable method for assessing relatively large areas of reef habitat, the method involves towing a pair of SCUBA divers—one benthic and one fish—behind a small boat for approximately 50 min following the ~15-m depth contour and covering about 2–3 km of habitat. Each diver is equipped with a towboard and attempts to maintain a constant elevation above the surface of the reef (~1 m) for the duration of the survey. A complete towed-diver survey is divided into 10, 5-min segments, with visual observations recorded by 5-min segment. The visual estimate data provided in this dataset were collected during towed-diver surveys which includes percentage cover of total live hard corals, stressed hard corals, soft corals, sand, coralline algae, and macroalgae, and the number of individual macroinvertebrates (crown of thorns starfish (COTS), sea urchins, and giant clams). Benthic habitat complexity and type data are also collected as part of the survey with the following habitat type categories: continuous reef, spur and groove, patch reefs, rock boulders, pavement, rubble flat, sand flats, pinnacle, and wall. The data were collected at coral reefs across all U.S.-affiliated regions as part of the NOAA Pacific Islands Fisheries Science Center (PIFSC), Coral Reef Ecosystem Program (CREP) led missions since 2000. These data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive.

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1221 587 C204 Pacific Reef Assessment and Monitoring Program (Pacific RAMP): Biennial monitoring for the US Pacific Islands and Atolls Pacific Reef Assessment and Monitoring Program: Monitoring coral reef ecosystems of the US Pacific Islands and Atolls Numeric Data Sets > Biology EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat EARTH SCIENCE > Biosphere > Zoology > Corals EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Mortality

Complete Metadata
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describedByType application/octet-steam
description The towed-diver method is used to conduct benthic surveys, assessing large-scale disturbances (e.g., bleaching) and quantifying benthic components such as habitat complexity/type and the general distribution and abundance patterns of live coral, CCA, macroalgae, and macroinvertebrates. Surveys are conducted in the Hawaiian and Mariana Archipelagos, American Samoa, and the Pacific Remote Island Areas as part of the NOAA National Coral Reef Monitoring Program (NCRMP). A suitable method for assessing relatively large areas of reef habitat, the method involves towing a pair of SCUBA divers—one benthic and one fish—behind a small boat for approximately 50 min following the ~15-m depth contour and covering about 2–3 km of habitat. Each diver is equipped with a towboard and attempts to maintain a constant elevation above the surface of the reef (~1 m) for the duration of the survey. A complete towed-diver survey is divided into 10, 5-min segments, with visual observations recorded by 5-min segment. The visual estimate data provided in this dataset were collected during towed-diver surveys which includes percentage cover of total live hard corals, stressed hard corals, soft corals, sand, coralline algae, and macroalgae, and the number of individual macroinvertebrates (crown of thorns starfish (COTS), sea urchins, and giant clams). Benthic habitat complexity and type data are also collected as part of the survey with the following habitat type categories: continuous reef, spur and groove, patch reefs, rock boulders, pavement, rubble flat, sand flats, pinnacle, and wall. The data were collected at coral reefs across all U.S.-affiliated regions as part of the NOAA Pacific Islands Fisheries Science Center (PIFSC), Coral Reef Ecosystem Program (CREP) led missions since 2000. These data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive.
distribution 
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identifier https://data.noaa.gov/waf/NOAA/nmfs/pifsc/iso/xml/35618.xml
issued 2016-01-01T00:00:00.000+00:00
keyword 
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  "587",
  "C204 Pacific Reef Assessment and Monitoring Program (Pacific RAMP): Biennial monitoring for the US Pacific Islands and Atolls",
  "Pacific Reef Assessment and Monitoring Program: Monitoring coral reef ecosystems of the US Pacific Islands and Atolls",
  "Numeric Data Sets > Biology",
  "EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat",
  "EARTH SCIENCE > Biosphere > Zoology > Corals",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Mortality",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Photic Zone Corals",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Benthic biology",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Coral Cover",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Hard Coral Cover",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Hard Coral Cover Dead percentage",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Hard Coral Cover Live percentage",
  "EARTH SCIENCE > Oceans > Marine Biology > Coral",
  "EARTH SCIENCE > Oceans > Marine Biology > Coral Communities",
  "EARTH SCIENCE > Oceans > Marine Biology > Macroinvertebrates",
  "EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates",
  "EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Census",
  "EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Census > Macroinvertebrates",
  "EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Census > Population Density",
  "EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Macroinvertebrates",
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  "DEBRIS",
  "DEPTH - SENSOR",
  "HABITAT - BENTHIC",
  "MACROINVERTEBRATE CENSUS",
  "REEF AND/OR BOTTOM REGIME - PERCENT COVER",
  "TEMPERATURE",
  "survey",
  "survey - biological",
  "survey - coral reef",
  "survey - swimmer/diver",
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  "HI'IALAKAI",
  "OSCAR ELTON SETTE",
  "TOWNSEND CROMWELL",
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  "COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Hawaii (21N160W0000)",
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  "COUNTRY/TERRITORY > United States of America > Hawaii > Maui > Lanai Island (20N156W0002)",
  "COUNTRY/TERRITORY > United States of America > Hawaii > Maui > Maui Island (20N156W0004)",
  "COUNTRY/TERRITORY > United States of America > Hawaiian Islands (21N157W0027)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands (21N157W0027)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii > Hawaii (21N160W0000)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii Island > Hawaii Island (19N155W0003)",
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  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Maui Island > Maui Island (20N156W0004)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Oahu (21N157W0003)",
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  "CREP",
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  "PIFSC",
  "Pacific Islands Fisheries Science Center",
  "RAMP",
  "Reef Assessment and Monitoring Program",
  "TDS",
  "Towed-diver surveys",
  "towboard",
  "towed diver",
  "Biennial",
  "MHI",
  "Main Hawaiian Islands",
  "DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
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landingPage https://www.fisheries.noaa.gov/inport/item/35618
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2016-01-01T00:00:00.000+00:00
publisher 
{
  "name": "Pacific Islands Fisheries Science Center",
  "@type": "org:Organization"
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rights otherRestrictions, unclassified
spatial -154.83979027,18.90836853,-160.54516804,22.23705898
temporal 2005-07-14T00:00:00+00:00/2005-08-06T00:00:00+00:00
theme 
[
  "geospatial"
]
title Pacific Reef Assessment and Monitoring Program: Towed-diver Surveys of Benthic Habitat, Key Benthic Species, including Marine Debris Sightings, of the U.S. Pacific Reefs from 2000 to 2012

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