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Historically, industrial fishers avoided coral because their nets would get caught on the reefs. In the 1980s, "rock-hopper" trawls attached large tires and rollers to allow the nets to roll over rough surfaces. Fifty-five percent of Alaskan cold-water coral that was damaged by one pass from a bottom trawl had not recovered a year later.
Deep water coral habitats are also threatened by human activities, particularly by indiscriminate trawling. These ecosystems have been little studied, but in the perpetual darkness and cold temperatures, animals grow and mature slowly and there are relatively fewer fish worth catching than in the sunlit waters above.
Our Planet is a British nature documentary series made for Netflix.The series is narrated by David Attenborough and produced by Silverback Films, led by Alastair Fothergill and Keith Scholey, who also created BBC documentary series Planet Earth, Frozen Planet and The Blue Planet, in collaboration with the conservation charity World Wildlife Fund (WWF).
Primnoa pacifica or red tree coral is a species of soft coral in the family Primnoidae. It is a deep water coral found in the North Pacific Ocean, and plays an integral role in supporting benthic ecosystems. Red tree corals grow axially and radially, producing structures of calcite and gorgonian skeletons that form dense thickets.
Despite this interest, the deep depths of such reefs hinders both their discovery and their exploration. Coral reefs struggle to survive in the world today. "In the past 10 years the world has lost 25% of the known living coral reefs". [3] Coral reefs are particularly damaged by "…climate change, over fishing and coastal pollution". [3]
Red List assessments of cold-water corals, which are found in colder, deeper waters around the world and do not depend on sunlight, are ongoing, with threats including fishing activity, especially ...
Deep-water coral Paragorgia arborea and a Coryphaenoides fish at a depth of 1,255 m (4,117 ft) on the Davidson Seamount. The habitat of deep-water corals, also known as cold-water corals, extends to deeper, darker parts of the oceans than tropical corals, ranging from near the surface to the abyss, beyond 2,000 metres (6,600 ft) where water temperatures may be as cold as 4 °C (39 °F).
Research suggests that while surface-dwelling coral use color to help block sunlight, their deep-sea cousins may actually use color differently. Scientists may finally know why these magnificent ...