🔊Echosounder

An instrument measuring depth using sound waves.

🌀Eddy

A circular movement of water formed where currents meet.

🌊Estuary

A coastal area where freshwater rivers meet and mix with seawater.

🌊Eutrophication

Nutrient enrichment of water causing excessive plant growth.

🦠Extremophile

An organism thriving in extreme environmental conditions.

🎣Fishery

An area where fish are caught or farmed.

🕸️Food Web

A network of interconnected food chains in an ecosystem.

🗑️Great Pacific Garbage Patch

A large area of marine debris concentrated by ocean currents.

🌊Gulf Stream

A warm Atlantic ocean current flowing from the Gulf of Mexico.

🗻Guyot

A flat-topped underwater mountain.

🔄Gyres

Large systems of circular ocean currents.

🌋Hydrothermal Vent

A seafloor opening releasing heated mineral-rich water.

🫁Hypoxia

Low oxygen conditions in ocean water.

🌿Kelp Forest

An underwater ecosystem dominated by large brown algae.

🦐Krill

Small shrimp-like crustaceans important in marine food webs.

🏝️Lagoon

A shallow body of water separated from the sea by a reef.

🌴Mangrove

A coastal tree community that protects shorelines and supports wildlife.

🐠Marine Biology

The study of organisms living in the ocean.

🗑️Marine Debris

Human-made waste found in the ocean.

🐠Marine Ecosystem

A community of organisms interacting with the ocean environment.

🪨Marine Geology

The study of the seafloor and its geological processes.

🛡️Marine Protected Area

A zone in the ocean where human activity is restricted.

🔬Microplastic

Tiny plastic particles that contaminate water and soil.

⛰️Mid-Ocean Ridge

An underwater mountain range formed by plate tectonics.

🌓Neap Tide

A tide of minimum range occurring at quarter moons.

🐟Nekton

Marine organisms capable of swimming against currents.

🌊Ocean

A vast body of saltwater covering most of Earth's surface.

🌊Ocean Acidification

The decrease in ocean pH caused by absorbing carbon dioxide.

🌊Ocean Current

A continuous directed movement of seawater.

💻Ocean Model

A computer simulation of ocean circulation and properties.