coral reef

Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals. Coral reefs are built by colonies of tiny animals found in marine water that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups. The polyps belong to a group of animals known as Cnidaria, which also includes sea anemones and jellyfish. Unlike sea anemones, corals secrete hard carbonate exoskeletons which support and protect the coral polyps. Most reefs grow best in warm, shallow, clear, sunny and agitated water. Often called "rainforests of the sea", shallow coral reefs form some of the most diverse ecosystems on Earth. They occupy less than 0.1% of the world's ocean surface, about half the area of France, yet they provide a home for at least 25% of all marine species, including fish, mollusks, worms, crustaceans, echinoderms, sponges, tunicates and other cnidarians. Paradoxically, coral reefs flourish even though they are surrounded by ocean waters that provide few nutrients. They are most commonly found at shallow depths in tropical waters, but deep water and cold water corals also exist on smaller scales in other areas.
Underwater world. - Mysterious underwater world.
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Underwater world.

Added week ago by Grażyna

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Aquarium - colorful jigsaw puzzle
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Aquarium

Added 13 days ago by andi

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Aquarium - colorful jigsaw puzzle
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Aquarium

Added 13 days ago by andi

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Underwater world. - Mysterious underwater world.
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Underwater world.

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Vietnam. Coral reef. - Vietnam. Coral reef.
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Vietnam. Coral reef.

Added month ago by Zeta

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Landscape - colorful jigsaw puzzle
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Landscape

Added 2 months ago by andi

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Cottage on the islet. - Cottage on the islet on the sea.
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Cottage on the islet.

Added 2 months ago by Zeta

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CORAL REEF - coral reef, sea anemone
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CORAL REEF

Added 2 months ago by sandra

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CORAL REEF - ocean, coral reef, marine fauna
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CORAL REEF

Added 2 months ago by sandra

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CORAL REEF - coral reef, underwater life, colorful fish
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CORAL REEF

Added 2 months ago by sandra

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CORAL REEF - coral reef, ocean, underwater world
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CORAL REEF

Added 2 months ago by sandra

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BAJKOWY VIEW - Vacation, rest, sightseeing
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BAJKOWY VIEW

Added 2 months ago by Ada

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BAJKOWY VIEW - Vacation, rest, sightseeing
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BAJKOWY VIEW

Added 2 months ago by Ada

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atoll on the ocean - sea ​​landscape, atoll, coral reef
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atoll on the ocean

Added 2 months ago by sandra

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CORAL REEF - coral reef, marine fauna, ocean,
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CORAL REEF

Added 2 months ago by sandra

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Colorful fish - colorful fish puzzle
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Colorful fish

Added 4 months ago by andi

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Colorful fish - colorful aquarium puzzle
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Colorful fish

Added 4 months ago by andi

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View from space - colorful jigsaw puzzle
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View from space

Added 4 months ago by andi

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Life of the ocean - colorful jigsaw puzzle
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Life of the ocean

Added 4 months ago by andi

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yards in the depths - depths
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yards in the depths

Added 4 months ago by olka

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Where is Nemo - Lorem ipsum dolor sit amet
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Where is Nemo

Added 4 months ago by Ayla

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Fluorescent anemone - Fluorescent anemone
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Fluorescent anemone

Added year ago by Ilona

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Underwater world - colorful puzzle with fishes
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Underwater world

Added year ago by andi

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Underwater world - colorful puzzle jigsaw
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Underwater world

Added year ago by andi

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Light illumination - colorful puzzle of trees
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Light illumination

Added year ago by andi

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Aquarium - colorful puzzle jigsaw
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Aquarium

Added year ago by andi

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Underwater life - colorful puzzle jigsaw
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Underwater life

Added year ago by andi

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Płetwo-diver

Added year ago by andi

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Abstraction - a complicated puzzle
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Abstraction

Added year ago by andi

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