Species
Swordfish
Xiphias gladius
Xiphias gladius, commonly known as the swordfish, is a large pelagic fish that typically reaches 2–3 meters in length.
Ocean Literacy Principle 1
Earth has one big ocean with many features
Explore how one connected ocean contains very different regions, currents, and habitats, from open pelagic waters to productive upwelling systems and distant ecoregions linked by circulation.
Guiding question: How do different ocean places belong to one connected system?
Short labelOne ocean, many features
Guiding questionHow do different ocean places belong to one connected system?
Mapped resources45
Featured Species
Species
Tiger shark
Galeocerdo cuvier
The tiger shark lives in both coastal and open ocean waters, including estuaries where rivers meet the sea.
Species
Copepod
Paracalanus parvus
Paracalanus parvus is a tiny crustacean that drifts in the upper layers of the ocean.
Featured Ecoregions
Ecoregion
Equatorial Pacific
Pelagic
The Equatorial Pacific looks poor in life, with warm, clear waters. But winds and deep currents sometimes push up cool, nutrient-rich water. This upwelling sparks plankton blooms that feed surprising food webs. Even this “ocean desert” hides bursts of life.
Ecoregion
Mediterranean Sea
Temperate
The Mediterranean is a mostly enclosed sea with warm, salty waters. In summer it is calm and layered, but in winter storms mix the waters and bring up nutrients. River inflows and upwelling can spark short blooms of life. Because it is cut off from the open ocean, it has many unique species but is very sensitive to change.
Ecoregion
Indian Ocean Gyre
Pelagic
The Indian Ocean Gyre covers wide areas of poor, clear water. It looks empty, with few nutrients and little food. Yet it supports plankton and migrating fish like tuna. It is also a place where floating plastics collect.
Featured Cards
Opportunity
Deep Currents
Opportunity
Strong currents bring fresh oxygen into deep canyons, helping the life within
Special
Turning Tide
Special
Strong tidal currents reverse direction, changing the movement of water and organisms across the ecosystem.
Featured Tools
Tool
WebGIS
Tool
Explore places, layers, and ocean datasets in the interactive map.
Tool
Knowledge Graph
Tool
Trace connected species, ecoregions, pressures, and opportunities.
Start Here
Species
Follow a highly migratory species
Swordfish help show that the ocean is connected across basins rather than divided into isolated places.
Systems View
This principle becomes visible when students compare distant ocean regions, follow widely distributed species, and trace how currents and basin-scale circulation connect different parts of the planet.
Why It Matters
This principle helps students understand that different ocean places are not isolated. Regional differences matter, but they are all part of one interconnected global system.
Classroom prompt: Choose one species and one ecoregion on this page. Explain how they show both ocean diversity and ocean connection at the same time.
Mapped Resources
This section shows the broader resources currently connected to this principle. It will become more valuable as mappings are refined.