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Cliona celata, occasionally called the boring sponge, is a species of demosponge belonging the family Clionaidae. [1] It is found worldwide. This sponge bores round holes up to 5 millimetres (0.20 in) in diameter in limestone or the shells of molluscs, especially oysters.
OJ 287 core black holes — a BL Lac object with a candidate binary supermassive black hole core system [23] PG 1302-102 – the first binary-cored quasar — a pair of supermassive black holes at the core of this quasar [24] [25] SDSS J120136.02+300305.5 core black holes — a pair of supermassive black holes at the centre of this galaxy [26]
This is a partial list of edible molluscs. Molluscs are a large phylum of invertebrate animals, many of which have shells . Edible molluscs are harvested from saltwater, freshwater, and the land, and include numerous members of the classes Gastropoda (snails), Bivalvia (clams, scallops, oysters etc.), Cephalopoda (octopus and squid), and ...
A mantle cleft in the shell impresses a groove in the shell, in which are the row of holes (known as tremata), characteristic of the genus. These holes are respiratory apertures for venting water from the gills and for releasing sperm and eggs into the water column. They make up what is known as the selenizone which forms as the shell grows ...
Haliotis cracherodii, the black abalone, is a species of large edible sea snail, a marine gastropod mollusk in the family Haliotidae, the abalone. [3]This species is relatively small compared with most of the other abalone species from the eastern Pacific, and it has a relatively smooth dark shell.
This is a list of lists of black holes: List of black holes; List of most massive black holes; List of nearest known black holes; List of quasars; See also.
The number of gastropod species can be ascertained from estimates of the number of described species of Mollusca with accepted names: about 85,000 (minimum 50,000, maximum 120,000). [9] But an estimate of the total number of Mollusca, including undescribed species, is about 240,000 species. [10]
Zonitoides nitidus (sometimes Zonitoides nitida), [2] also known as the shiny glass snail or black gloss, is a species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Gastrodontidae. [3] Zonitoides nitidus is the type species of the genus Zonitoides.