Pacific Ocean

The Pacific Ocean: An Ocean of Superlatives

The Pacific Ocean is named after the Portuguese explorer Ferdinand Magellan. During his voyage around the world in 1520-1521, he sailed through a previously unknown ocean. He named it “Mar Pacifico”, meaning “peaceful sea”, because of the calm conditions he found there. Ironically, the Pacific Ocean is far from always peaceful, with frequent typhoons and volcanic activity.

The Pacific Ocean is the largest ocean on Earth, covering about one-third of the Earth’s surface. It stretches from the Arctic Ocean in the north to the Southern Ocean in the south, and from Asia and Australia in the west to the Americas in the east. A vast number of countries border this ocean, including (but not limited to): Russia, Japan, China, the United States, Canada, Mexico, Peru, Chile, Australia, Indonesia, and the Philippines. Some major cities along the Pacific include Los Angeles, San Francisco, Vancouver, Tokyo, Shanghai, Sydney, and Hong Kong.

Habitat and Biodiversity

The Pacific Ocean is home to incredible biodiversity, from the icy polar regions to the warm tropical coral reefs. Its vast size and diverse environments create a wide range of habitats for countless species. Some major rivers that flow into the Pacific include the Yangtze, Mekong, Columbia, and Yukon.

The exact number of fish species in the Pacific is difficult to determine, but it is estimated to be in the thousands. The ocean is a vital source of food for millions of people, with major commercial fisheries for species such as tuna, salmon, and cod. The Pacific also provides a wide range of species for the aquarium trade, ranging from colorful coral fish to fascinating invertebrates.

Major Aquarium-Friendly Fish Species

The Pacific Ocean is the source of many popular aquarium fish. Some examples include:

  • Anemonefish: These brightly colored fish, known from the movie Finding Nemo, live in symbiosis with anemones.
  • Surgeonfish: These fish are loved for their striking colors and interesting behavior.
  • Seahorses: These delicate creatures require special care in an aquarium
  • Lionfish: Although beautiful, these fish are venomous and require an experienced aquarist.

Biotopes

The Pacific Ocean has a wide variety of biotopes, including:

  • Coral reefs: These vibrant ecosystems occur in warmer, shallow waters and are home to a huge diversity of life.
  • Kelp forests: These underwater forests of giant kelp provide shelter and food for many species.
  • Deep sea: The deep, dark parts of the ocean are home to mysterious and often bizarre life forms.
  • Open ocean (pelagic zone): This is home to large, migratory species such as tuna and sharks.
  • Estuaries: Where rivers meet the ocean, brackish waters form and create a unique habitat.
  • Mangrove forests: These coastal areas provide shelter for young fish and other animals.

    • Water parameters

    Water circulation in the Pacific Ocean is complex and is influenced by winds, currents, and temperature differences. Major oceanic currents, such as the Kuroshio and California currents, play an important role in climate and the distribution of marine organisms.

    Water parameters in the Pacific Ocean vary depending on location and depth. In general, salinity (salt content) is around 35 PSU, which corresponds to a specific gravity (sg) of about 1.026. Temperatures range from below freezing in the polar regions to above 30°C in the tropics. The pH value is on average around 8.1.

    Animal species

    Below you will find the animal species that occur in the Pacific Ocean and have been added to our database: