The Secret Garden of the Deep

The vastness of the deep sea is gradually becoming comprehended. Our understanding of the ocean’s intricate processes and diversity is continually being challenged by fresh discoveries. One deep marine habitat, though, remains a complete mystery to us. We’re only now starting to look into deep marine canyons, and we’re just getting started. We’ve discovered coral reefs that are diversified and prolific that we didn’t know existed until lately. Colorful sponge gardens and corals line the chasms, giving them an enormous scale. And ridges of vast canyons, some of which are 6,000 meters or 20,000 feet deep, rivaling the Grand Canyon in size.

But how do they stay alive in this freezing, black abyss?

Let’s have a look at what we’ve got. The deep water is the last location you’d expect to see corals. But there are rich plants blooming in the frigid waters down in the darkness. A swath of vibrant structures sprouting from the seabed. These ecosystems are biodiversity hotspots, providing vital habitat for deep-dwelling life.

Despite this, they are one of the least understand deep marine ecosystems.

Deep-sea corals, like shallow reef corals, formed up of colonies of coral polyps that cooperate together to survive. When a polyp attaches itself to a rock, they develop. Through the process of budding, it divides into thousands of clones. The polyps then secrete a calicle, a protective limestone skeleton that forms the coral structure. The corals of the deep, on the other hand, distinguished by their resistance to extremes.

Because they aren’t reliant on warm water. They can survive in temperatures as low as -1 degree Celsius. And throughout the ocean basins, producing havens of life amidst huge canyons, continental shelves, and slopes. As well as on colossal ocean seamounts. They survive from 150 feet to more than 10,000 feet below sea level, unlike tropical reefs.

Where there is little or no sunlight. As a result, rather of getting energy or nutrients from sunshine. They feed on the dead and collect all they require by capturing organic waste known as marine snow that floats by on the currents. However, the shallows’ leftovers are insufficient on their own. The corals also devour creatures like krill and plankton in this area, entangling them in their branching, feathery, fan-shaped formations.

Mounds are another name for deep sea reefs. This is due to the fact that as the reef grows, the corals underneath die off, leaving a massive calcium carbonate skeleton behind. These accumulate over time, providing the stony surface on which new polyps might cling and grow. Lophelia pertusa is the name of this coral species, which is one of the most extensively distribute deep water corals.

As a small larva, this branching stony coral drifted through the deep.

It began to expand into a colony once it landed on hard rock. The outer branches now block water from flowing to the inner branches as it grows. As a result, the polyps inside are deprive of food and oxygen. Inner branches die, weaken, and disintegrate, while live branches outgrow the skeleton. This cycle of death is necessary for new life to emerge on the reefs, which leads to the ecosystem’s expansion throughout time.


For thousands of years, the cycle of growth, death, collapse, and overgrowth has continued. And it produces reefs that can reach hundreds of feet in height. Massive, intricate structures that support marine life with unique and critical habitats.

Tree corals, for example, develop dense coral gardens that serve as essential spawning and nursery grounds. These deep marine gardens are home to an incredible variety of species. This is due to the fact that they are establish communities.

One gold coral colony discovered near Hawaii thought to be around 2,700 years old. Another 4,200-year-old black coral colony has been discover, making these colonies the oldest marine animals yet discovered.

Polyps have the potential to renew on a continuous basis. For almost 40,000 years, certain deep reefs have thrived and expanded. As a result of their constant and unchanging nature, these habitats for marine life have been created. And this has allowed organisms to diversify and evolve into genuinely unique beings. Worms, anemones, starfish, and lobsters are among the many invertebrates that rely on these deep corals.

Many fish reside here as well, relying on the corals for food, hiding from predators, and nursing their young.

Demersal animals can be find here. This means that they, like this red coffin fish, reside on or near the seafloor. A deep water anglerfish with specially developed fins that walks around the reef. Corals can form symbiotic connections with the demersal organisms on the reefs in some situations. This crab discovered with a colony of Zoanthid corals on its back.

The crab benefits from the coral’s ability to provide some protection. As the crab wanders around, the coral has better access to food. It also doesn’t have to fight with other corals for space. Deep sea reefs, despite their distant location, are not immune to human devastation. Bottom-trawl fishing, an indiscriminate and destructive approach that catches undesirable creatures, including corals, as bycatch, poses a threat to them. The loss of these corals has a devastating effect on deep sea life. They do not rely on a symbiotic algae (zooxanthellae) for development and survival, unlike shallow water corals. As a result, they mature at a ten-fold slower rate.

Trawling reduces them to sand, with an annual growth rate of a few millimetres. Coral groves that have been damage will not regrow for hundreds of years, if at all.

Deep sea coral gardens are essential to the delicate deep sea environment in general. In providing food and safety for marine life, including numerous species that are only find on these reefs. They help to keep the ocean’s biodiversity alive. Their particular adaptations to a cold, dark sea, as well as their supporting function in the greater ecosystem, represent a unique habitat that we have only just begun to investigate. They must protected and safeguarded, or we risk losing another deep-sea wonder.

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