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More than 8000 species of sea sponges live in oceanic and freshwater habitats. [1] Sponge fishing historically has been an important and lucrative industry, with yearly catches from years 1913 to 1938 regularly exceeding 181 tonnes and generating over 1 million U.S. dollars. However, this demand for sea sponges has seen catch rates peak and in ...
The giant barrel sponge has been called the "redwood of the reef" [4] because of its large size and its long lifespan, which can be more than 2,000 years. [5] It is, perhaps, the best-studied species of sponge in the sea; a population on Conch Reef , in the Florida Keys , has been monitored and studied since 1997.
Each living sponge on the surface of the reef can be over 1.5 m tall. The reefs are composed of mounds called "bioherms" that are up to 21 m high, and sheets called "biostromes" that are 2–10 m thick and may be many kilometers wide. [5] Each sponge in the order Hexactinosa has a rigid skeleton that persists after the death of the animal.
Live rock prior to installation into a reef tank In J. Charles Delbeek's article Your First Reef Aquarium , [ 2 ] he states, The use of live rock immediately introduces into the aquarium numerous algae, bacteria and small invertebrates all of which contribute to the overall quality of the aquarium water.
Hydnoceras species were suspension feeders, and likely remained attached to a single substrate for their entire lives, as typical for a sponge. [3] Unlike modern glass sponges , which typically live in deep marine environments, these sponges lived throughout the marine water column.
Glass sponges such as Claviscopulia are found worldwide in both hard and soft substrates and in the deeper part of the sea ranging from around 200m to more than 6000m. In some cases, glass sponges live in shallower areas like the submarine caves in Mediterranean or off the coast of British Columbia.
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