Geography
This is the largest ocean in the world.
Pacific Ocean
This happens when the ocean's water level rises and falls throughout the day.
What are tides?
This international organization works to protect the world's environment.
What is the United Nations (UN)?
These tiny organisms use sunlight to make food and support ocean food chains.
What are phytoplankton?
The male of this marine species is famous for being the only species in the world where the male lays eggs.
What is a seahorse?
This ocean surrounds Antarctica.
What is the Southern Ocean?
This process brings cold, nutrient-rich water from the deep ocean to the surface.
What is upwelling?
This type of fishing allows fish populations to recover and remain healthy.
What is sustainable fishing?
These eight-armed animals are known for their intelligence and ability to camouflage.
What is an octopus?
This marine mammal is famous for using rocks to crack open shellfish while floating on its back.
What are sea otters?
This country is home to the Great Barrier Reef, the world's largest coral reef system.
What is Australia?
This ocean layer is where temperature decreases rapidly with depth.
What is the thermocline?
This protected area is created to conserve marine life and ocean habitats.
What is a Marine Protected Area (MPA)?
These marine animals have a hard outer skeleton, live in colonies, and provide habitats for many ocean species by building coral reefs.
What are corals?
This marine animal has a powerful bite and can replace thousands of teeth throughout its lifetime.
What is the Great White Shark?
Connecting the Mediterranean Sea to the Red Sea, this Egyptian waterway allows ships to avoid sailing around Africa.
Suez Canal
This boundary in the ocean separates two water masses with different salinities, creating a layer where salt concentration changes rapidly with depth.
What is the halocline?
This is the accidental capture of unwanted animals during fishing.
What is bycatch?
These structures in fish contain thin filaments with a large surface area, allowing oxygen to diffuse from the water into the blood.
What are gills?
Surprisingly, the closest living relatives of whales are not dolphins, but these semi-aquatic African mammals.
What are hippos?
Located between Russia and Alaska, this narrow strait separates two continents and lies just 53 miles apart at its narrowest point.
Bering Strait
This type of ocean current is mainly driven by wind blowing across the water's surface.
What are wind-driven currents?
This international treaty establishes rules for countries using ocean resources and waters.
What is the United Nations Convention on the Law of the Sea (UNCLOS)?
Micro-algae endosymbionts that live within coral polyps are known by this scientific name.
What are zooxanthellae?
This Arctic marine mammal uses its long tusk, which is actually an extended tooth, to help it sense its surroundings.
What is a narwhal?