A large, powerful wave caused by underwater earthquakes or volcanic activity.

A body of salt water that is smaller than an ocean and is partially enclosed by land.

The layer of the ocean where sunlight penetrates and supports photosynthesis.

An underwater ecosystem characterized by the presence of corals, often referred to as the 'rainforests of the sea'.

A strong ocean current that flows away from the equator, often influencing climate and weather patterns.

The movement of water caused by the gravitational pull of the moon and sun, leading to regular rise and fall of sea levels.

The region of the ocean that is particularly deep and extends below the photic zone.

The phenomenon where warm water is deposited near the surface and cold water rises from below, often leading to nutrient-rich areas.

A large body of saltwater that is partially enclosed by land and usually connects to an ocean, often with a specific name.

An area of the ocean where freshwater from rivers meets and mixes with saltwater from the sea.