{ "title": "Ocean Explorer \u2014 continuous descent", "reviewed": "2026-09-17", "scope": "Curated educational journey across different habitats, not one location or a live feed. Scroll scale is nonlinear. Artistic scenes are labelled.", "deepestPointMeters": 10935, "deepestPointSource": "https://oceanexplorer.noaa.gov/exploration-extras/22-national-ocean-month/", "pressureFormula": "approximate absolute pressure in atm = 1 + depthMeters / 10", "journey": [ { "id": "surface", "depth": 0, "zone": "The sunlit ocean", "image": "sunlight.webp", "mobile": "sunlight-mobile.webp", "heading": "A world beneath
our world.", "copy": "From the largest travelers to the smallest drifters.
One extraordinary ocean. All the way down.", "label": "THE SURFACE", "type": "hero", "life": [ [ "whale", "The great travelers", "Meet the humpback whale" ] ], "zoom": "whale", "credit": "Artist\u2019s interpretation", "note": "Scroll to descend. Tap a discovery to look closer." }, { "id": "reef", "depth": 20, "zone": "Shallow coral reefs", "image": "reef.webp", "mobile": "reef-mobile.webp", "heading": "A thousand lives.
One living city.", "copy": "Sunlight spills across a reef built by tiny animals.
Look closer. Almost every surface is alive.", "label": "20 M / SHALLOW REEFS", "type": "reef", "life": [ [ "reef", "The reef\u2019s tiny architects", "Zoom into real coral polyps" ] ], "zoom": "reef", "credit": "Reef environment: artist\u2019s interpretation", "note": "An imagined reef, inspired by tropical biodiversity." }, { "id": "plankton", "depth": 60, "zone": "The microscopic ocean", "image": "plankton.webp", "mobile": "plankton-mobile.webp", "heading": "A drop of ocean.
A universe of life.", "copy": "Pause the descent. Change your sense of scale.
There is an extraordinary world hiding in the water.", "label": "60 M / CHANGE YOUR SCALE", "type": "microscopic", "life": [ [ "plankton", "Look inside a drop", "Explore, magnify, and drag" ], [ "phyto", "The light gatherers", "Real microscopy" ], [ "copepod", "A miniature traveler", "Meet a copepod" ] ], "zoom": "plankton", "credit": "Magnified artistic montage \u00b7 not to scale", "note": "Switch between the imagined overview and real specimen images." }, { "id": "twilight", "depth": 800, "zone": "The twilight zone", "image": "siphonophore.jpg", "heading": "The light fades.
Life surprises.", "copy": "At the edge of daylight, a delicate colony drifts.
Many connected lives, moving as one.", "label": "800 M / THE TWILIGHT ZONE", "type": "twilight right-copy", "life": [ [ "siphonophore", "A living collaboration", "Watch the NOAA encounter" ] ], "credit": "NOAA \u00b7 Musicians Seamounts, 2017", "note": "Actual observation at approximately 800 m." }, { "id": "coral-garden", "depth": 2270, "zone": "Deep coral gardens", "image": "deep-coral.jpg", "heading": "The reef story
doesn\u2019t end above.", "copy": "Far below sunlight, corals still make a home.
A different kind of garden. The same capacity for wonder.", "label": "2,270 M / DEEP CORAL GARDENS", "type": "deepcoral", "life": [ [ "deepcoral", "A garden in the dark", "Explore real deep-sea coral" ] ], "zoom": "deepcoral", "credit": "NOAA \u00b7 Seascape Alaska 3, 2023", "note": "Real Hemicorallium coral, observed near the Aleutian Islands." }, { "id": "midnight", "depth": 3700, "zone": "The midnight zone", "image": "midnight.webp", "mobile": "midnight-mobile.webp", "heading": "Beyond sunlight.
Beyond ordinary.", "copy": "There is no daylight here.
Yet life is delicate, intricate, and astonishing.", "label": "3,700 M / THE MIDNIGHT ZONE", "type": "midnight", "life": [ [ "jellyfish", "A jewel in the darkness", "Watch the real Crossota jellyfish" ] ], "credit": "Environment: artist\u2019s interpretation", "note": "The discovery opens real NOAA footage at about 3,700 m." }, { "id": "vents", "depth": 4960, "zone": "The abyss", "image": "abyss.webp", "mobile": "abyss-mobile.webp", "heading": "Another way
to be alive.", "copy": "In the darkness, chemistry becomes a source of food.
Life gathers where warm fluids emerge from Earth.", "label": "4,960 M / THE ABYSS", "type": "vents", "life": [ [ "vents", "An oasis powered by Earth", "Explore chemosynthesis" ] ], "zoom": "vents", "credit": "Artist\u2019s interpretation of a vent habitat", "note": "Depth inspired by Beebe vent-field observations, Cayman Trough." }, { "id": "hadal", "depth": 8336, "zone": "The hadal zone", "image": "hadal.webp", "mobile": "hadal-mobile.webp", "heading": "How deep
can life go?", "copy": "Here, pressure is hundreds of times greater than at the surface.
Even fish have reached this extraordinary depth.", "label": "8,336 M / THE HADAL ZONE", "type": "hadal", "life": [ [ "snailfish", "The deepest fish ever filmed", "Discover the snailfish record" ] ], "credit": "Artist\u2019s interpretation of a trench floor", "note": "The fish record is from the Izu\u2013Ogasawara Trench, not Challenger Deep." }, { "id": "deepest", "depth": 10935, "zone": "Challenger Deep", "image": "hadal.webp", "mobile": "hadal-mobile.webp", "heading": "The deepest place.
Not the end of wonder.", "copy": "From sunlight to Challenger Deep.
An entire world connected by water, energy, and life.", "label": "\u2248 10,935 M / CHALLENGER DEEP", "type": "deepest", "life": [ [ "challenger", "The edge of the known", "Explore Earth\u2019s deepest ocean" ] ], "zoom": "hadal", "credit": "Artist\u2019s interpretation \u00b7 depth is approximate", "note": "A journey across habitats, not a single geographic dive." } ], "discoveries": [ { "title": "Giants with
a gentle rhythm.", "latin": "Megaptera novaeangliae", "media": "whale.jpg", "caption": "Photograph: NOAA Fisheries. Humpback whale near the ocean surface.", "kind": "REAL WILDLIFE PHOTOGRAPH", "text": "Humpbacks turn small prey into an extraordinary life. They filter krill and small fish from seawater, and some groups cooperate to corral fish inside curtains of bubbles. Their long migrations connect feeding grounds with warmer breeding waters.", "facts": [ [ "FEEDING METHOD", "Filter feeding" ], [ "FAMILY", "Baleen whales" ] ], "question": "What does a humpback use to filter its food?", "answers": [ "Rows of teeth", "Plates of baleen" ], "correct": 1, "explain": "Baleen plates act like a sieve: water passes through while prey stays in the mouth.", "source": "https://www.fisheries.noaa.gov/species/humpback-whale", "sourceName": "NOAA Fisheries \u00b7 Humpback whale", "id": "whale", "depth": 40, "zoom": "whale" }, { "title": "Together,
extraordinary.", "latin": "Siphonophora", "media": "siphonophore.jpg", "video": "siphonophore.mp4", "caption": "NOAA Ocean Exploration \u00b7 Deep-Sea Symphony: Exploring the Musicians Seamounts (2017).", "kind": "REAL EXPEDITION FOOTAGE", "text": "This delicate form is a siphonophore: a colony of connected animals working together. NOAA filmed this encounter off Hawai\u02bbi at about 800 meters. What first looks like a drifting tangle is a living collaboration.", "facts": [ [ "OBSERVED DEPTH", "\u2248 800 m" ], [ "EXPEDITION", "Musicians Seamounts" ] ], "question": "Is a siphonophore one individual animal?", "answers": [ "Yes, one animal", "A connected colony" ], "correct": 1, "explain": "It is a colony. Its connected members specialize in jobs such as feeding, movement, and reproduction.", "source": "https://oceanexplorer.noaa.gov/multimedia/video-shorts-ex1708-siphonophore/", "sourceName": "NOAA Ocean Exploration \u00b7 Siphonophore", "id": "siphonophore", "depth": 800 }, { "title": "A small wonder.
A vast darkness.", "latin": "Crossota sp.", "media": "jellyfish.jpg", "video": "jellyfish.mp4", "caption": "NOAA Ocean Exploration \u00b7 2016 Deepwater Exploration of the Marianas. April 24, 2016.", "kind": "REAL EXPEDITION FOOTAGE", "text": "At roughly 3,700 meters near \u201cEnigma Seamount,\u201d NOAA\u2019s cameras revealed this exquisite jellyfish. Scientists identified it as Crossota. Its motionless bell and extended tentacles suggested that it was waiting to ambush prey. The expedition lights reveal its colors.", "facts": [ [ "OBSERVED DEPTH", "\u2248 3,700 m" ], [ "LOCATION", "Mariana region" ] ], "question": "What reveals the colors in this footage?", "answers": [ "Sunlight from above", "The vehicle\u2019s lights" ], "correct": 1, "explain": "At this depth there is no sunlight. The remotely operated vehicle illuminates the jellyfish so we can see it.", "source": "https://oceanexplorer.noaa.gov/multimedia/video-playlist-best-jellyfish/", "sourceName": "NOAA Ocean Exploration \u00b7 Crossota jellyfish", "id": "jellyfish", "depth": 3700 }, { "title": "An oasis.
Powered by Earth.", "latin": "Hydrothermal vent communities", "media": "abyss.webp", "caption": "AI-generated artistic interpretation of a hydrothermal vent environment; not a photograph of the Beebe vent field.", "kind": "ARTIST\u2019S INTERPRETATION", "text": "At hydrothermal vents, microbes can use chemical energy to make food through chemosynthesis. They support communities far from sunlight. The Beebe vent field in the Cayman Trough includes sampling sites around 4,960 meters deep\u2014a real example within this zone.", "facts": [ [ "EXAMPLE DEPTH", "\u2248 4,960 m" ], [ "ENERGY SOURCE", "Chemical reactions" ] ], "question": "What supports the base of a vent food web?", "answers": [ "Photosynthesis", "Chemosynthesis" ], "correct": 1, "explain": "Microbes use energy from chemical reactions to build organic matter. This process is called chemosynthesis.", "source": "https://www.pmel.noaa.gov/eoi/nemo/explorer/concepts/chemosynthesis.html", "sourceName": "NOAA PMEL \u00b7 Chemosynthesis", "extraSource": "https://doi.org/10.1002/2017GC006922", "extraSourceName": "Webber et al. (2017) \u00b7 Beebe vent depth", "id": "vents", "depth": 4960, "zoom": "vents" }, { "title": "Deeper than
Everest is tall.", "latin": "Challenger Deep \u00b7 Mariana Trench", "media": "trench.jpg", "caption": "NOAA Office of Ocean Exploration and Research. Deep Discoverer at 6,000 m in the Mariana Trench; not Challenger Deep.", "kind": "REAL EXPEDITION PHOTOGRAPH", "text": "Challenger Deep, in the western Pacific, reaches roughly 10.9 kilometers below sea level. Exploring such depths takes remarkable engineering. Every carefully designed vehicle and every new observation helps turn an inaccessible place into something we can understand.", "facts": [ [ "DEEPEST OCEAN", "\u2248 10.9 km" ], [ "SURFACE TO SEAFLOOR", "About 11 kilometers" ] ], "question": "Would Mount Everest fit beneath the surface here?", "answers": [ "Yes, with room above", "No, its peak would emerge" ], "correct": 0, "explain": "Yes. Everest is about 8.85 km tall. In a trench about 10.9 km deep, more than 2 km of water would remain above its summit.", "source": "https://oceanservice.noaa.gov/facts/oceandepth.html", "sourceName": "NOAA \u00b7 How deep is the ocean?", "extraSource": "https://oceanexplorer.noaa.gov/exploration-extras/22-national-ocean-month/", "extraSourceName": "NOAA \u00b7 Challenger Deep and Mount Everest", "id": "challenger", "depth": 10935, "zoom": "hadal" }, { "id": "reef", "depth": 20, "title": "A city built
by tiny animals.", "latin": "Coral polyps", "media": "coral-polyps.jpg", "caption": "Real coral polyp photograph: Rachel Plunkett / NOAA. Great star coral, Montastraea cavernosa.", "kind": "REAL MACRO PHOTOGRAPH", "text": "A reef begins with a tiny animal: a coral polyp. Colonies of these animals build calcium-carbonate skeletons that become habitat for countless other creatures. Many shallow reef-building corals also shelter microscopic algae that help supply their food.", "facts": [ [ "BUILDERS", "Coral animals" ], [ "PARTNERSHIP", "Coral + algae" ] ], "question": "Is a coral a plant, a rock, or an animal?", "answers": [ "An animal", "A plant or rock" ], "correct": 0, "explain": "Corals are animals. Hard corals build mineral skeletons, and many shallow species live with photosynthetic algae.", "source": "https://oceanservice.noaa.gov/facts/coral.html", "sourceName": "NOAA \u00b7 Are corals animals or plants?", "extraSource": "https://sanctuaries.noaa.gov/visit/ecosystems/coralwelcome.html", "extraSourceName": "NOAA Sanctuaries \u00b7 Coral imagery", "zoom": "polyps" }, { "id": "plankton", "depth": 60, "title": "Small lives.
Planet-sized impact.", "latin": "A world within a drop", "media": "plankton.webp", "caption": "AI-generated plankton montage. Organisms are shown at different artistic scales; this is not a microscope photograph.", "kind": "ARTIST\u2019S INTERPRETATION", "text": "Plankton drift with currents. This diverse community includes photosynthetic organisms and animals, from tiny crustaceans to much larger jellies. Explore the artistic overview, then switch to real microscopy and a real copepod image.", "facts": [ [ "LIFESTYLE", "Drifting" ], [ "ZOOM", "Digital image enlargement" ] ], "question": "Are all plankton microscopic?", "answers": [ "Yes, all are tiny", "No, some are large" ], "correct": 1, "explain": "Some plankton are large, including jellyfish. Drifting with currents is what makes an organism planktonic.", "source": "https://oceanservice.noaa.gov/facts/plankton.html", "sourceName": "NOAA \u00b7 What are plankton?", "zoom": "plankton" }, { "id": "phyto", "depth": 60, "title": "The ocean\u2019s
tiny producers.", "latin": "Phytoplankton", "media": "phytoplankton.jpg", "caption": "Real microscopy image from NOAA: Protoperidinium quinquecorne, enhanced with fluorescent dye; chlorophyll appears red.", "kind": "REAL MICROSCOPY IMAGE", "text": "Photosynthetic plankton capture light and help power marine food webs. NOAA estimates that the ocean produces roughly half of Earth\u2019s oxygen, while marine life consumes about the same amount. Small organisms can have a very large role.", "facts": [ [ "ENERGY", "Sunlight" ], [ "PROCESS", "Photosynthesis" ] ], "question": "What powers photosynthetic plankton?", "answers": [ "Sunlight", "Seafloor heat" ], "correct": 0, "explain": "They use light to make organic matter through photosynthesis.", "source": "https://oceanservice.noaa.gov/facts/ocean-oxygen.html", "sourceName": "NOAA \u00b7 Ocean oxygen production", "extraSource": "https://oceanservice.noaa.gov/facts/plankton.html", "extraSourceName": "NOAA \u00b7 Microscopy image", "zoom": "phyto" }, { "id": "copepod", "depth": 60, "title": "Meet a tiny
ocean traveler.", "latin": "Copepoda", "media": "copepod.jpg", "caption": "Real copepod image credited to NASA, reproduced on NOAA\u2019s plankton page.", "kind": "REAL SPECIMEN IMAGE", "text": "Copepods are small crustaceans related to shrimp and crabs. These widespread drifters are part of the zooplankton: the animal side of the plankton community.", "facts": [ [ "ANIMAL GROUP", "Crustaceans" ], [ "PLANKTON TYPE", "Zooplankton" ] ], "question": "Which group does a copepod belong to?", "answers": [ "Crustaceans", "Algae" ], "correct": 0, "explain": "Copepods are animals, distantly related to shrimp and crabs.", "source": "https://oceanservice.noaa.gov/facts/plankton.html", "sourceName": "NOAA \u00b7 Plankton and copepods", "zoom": "copepod" }, { "id": "deepcoral", "depth": 2270, "title": "Gardens beyond
the sun.", "latin": "Hemicorallium", "media": "deep-coral.jpg", "caption": "Real photograph: NOAA Ocean Exploration, Seascape Alaska 3 (2023). Hemicorallium observed at approximately 2,270 m.", "kind": "REAL EXPEDITION PHOTOGRAPH", "text": "Coral life continues far below shallow reefs. NOAA observed this Hemicorallium colony during a 2023 dive near the Aleutian Islands, around 2,270 meters down. Deep-water corals create structure and habitat in a world without sunlight.", "facts": [ [ "OBSERVED DEPTH", "\u2248 2,270 m" ], [ "EXPEDITION", "Seascape Alaska 3" ] ], "question": "Do all corals need warm, sunlit water?", "answers": [ "Yes, all of them", "No, deep corals thrive too" ], "correct": 1, "explain": "Many coral species live in cold, dark water. They capture food rather than relying on the sunlit partnerships typical of shallow reefs.", "source": "https://oceanexplorer.noaa.gov/education/deep-sea-corals/", "sourceName": "NOAA Ocean Exploration \u00b7 Deep-sea corals", "zoom": "deepcoral" }, { "id": "snailfish", "depth": 8336, "title": "Life at the
edge of possibility.", "latin": "Deep-sea snailfishes", "media": "snailfish.jpg", "video": "snailfish.mp4", "caption": "Example footage: NOAA Seascape Alaska 5 (2023), at 1,365 m. This is not the record-setting fish filmed at 8,336 m.", "kind": "REAL FOOTAGE / DIFFERENT DEPTH", "text": "A snailfish filmed at 8,336 meters holds the deepest confirmed fish-sighting record cited by NOAA. Snailfishes range from coastal waters to trenches. This example video shows a shallower species encounter; the deepest fish live under much more extreme pressure.", "facts": [ [ "DEEPEST FISH SIGHTING", "8,336 m" ], [ "THIS VIDEO", "1,365 m" ] ], "question": "Do fish reach the bottom of Challenger Deep?", "answers": [ "No confirmed sightings", "Yes, the record is there" ], "correct": 0, "explain": "The confirmed fish record is 8,336 m. Challenger Deep is much deeper, at roughly 10.9 km.", "source": "https://oceanexplorer.noaa.gov/ocean-fact/what-is-the-deepest-living-fish/", "sourceName": "NOAA \u00b7 Deepest-living fish" } ], "motion": { "ambientVideos": [ "siphonophore.mp4", "jellyfish.mp4" ], "stillImagery": "Gentle pan and zoom of labelled artistic and photographic scenes", "particles": "Decorative, not measured organisms or current data", "autoDescent": "Optional slow native scrolling; manual scrolling, touch outside the control, or navigation interrupts it" }, "learningModel": { "status": "prototype; effectiveness untested", "audience": "Ages 10+, no prerequisites", "duration": "10\u201315 minutes", "lightBoundariesMeters": [ 200, 1000 ], "maximumExperimentDepthMeters": 6000, "pressure": "approximate absolute pressure in atm = 1 + depthMeters / 10", "foodRoutes": [ "photosynthesis in the educational sunlight category", "organic food arriving from elsewhere", "chemosynthesis where suitable vent chemicals are present" ], "limitations": "Categorical educational model, not measured light intensity, rates of food production, population abundance, species survival, or a prediction of vent locations. Diagram spacing is nonlinear.", "sources": [ "https://oceanservice.noaa.gov/facts/light_travel.html", "https://www.pmel.noaa.gov/eoi/nemo/explorer/concepts/chemosynthesis.html", "https://oceanexplorer.noaa.gov/explainers/marine-life/" ] } }