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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 ...
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.
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.
The reef's rocky sandstone outcrops, submerged beneath 60 to 70 feet (18 to 21 m) of water, can be as tall as 2 to 3 metres (6 ft 7 in to 9 ft 10 in) and are highly complex. [2] These nooks and crannies provide plenty of places for marine invertebrates to latch on to and for fish to hide in. Together these animals form a dense tapestry of ...
All sponges in this class are strictly marine, and, while they are distributed worldwide, most are found in shallow tropical waters. Like nearly all other sponges, they are sedentary filter feeders. All three sponge body plans (asconoid, syconoid, and leuconoid) can be found within the class Calcarea. Typically, calcareous sponges are small ...
Live rock is harvested for use in the aquarium from reefs, either from natural or human breakage. It may also be "seeded" from small coralline rocks by an aquaculturalist in warm ocean water, to be harvested later. Live rock can also be seeded by adding base rock to an active reef aquarium that already has live rock.
Callyspongia (Cladochalina) aculeata, commonly known as the branching vase sponge is a species of sea sponge in the family Callyspongiidae. [1] Poriferans are typically characterized by ostia, pores that filter out plankton, with an osculum as the opening which water leaves through, and choanocytes trap food particles.
The sponge contains secondary metabolites that are distasteful to predatory fish such as the blue-headed wrasse (Thalassoma bifasciatum). Researchers found that the compounds involved were identical in various members of the genus Agelas , showing that such chemical defences must have been in use before the species evolved from a common ancestor.
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