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Monosiphonic or polysiphonic hydrocaulus are companions of erect colonies. [1] Bougainvillia aberrans is distinguishable in the sense that the degree of reduction of its medusa is unique compared to species of same genus. Moreover, B. aberrans is suppressed in the medusa stage. Hydroids of B. aberrans feed on fragments of other cnidarians. [4]
The hydrocaulus is usually surrounded by a sheath of chitin and proteins called the perisarc. In some species, this extends upwards to also enclose part of the polyps, in some cases including a closeable lid through which the polyp may extend its tentacles. [2] In any given colony, the majority of polyps are specialized for feeding.
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The branching system is alternate. The polyps are tiny and are supported by a hydrocaulus, a fairly stiff hollow tube with a perisarc (sheath) made of chitin and protein. This is dark brown or blackish, but is often colonised by algae and diatoms giving it a muddy appearance. [2] The whitish polyps are tinged with red.
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Metallica's video for their song "All Nightmare Long" is partially based on the film, and shows Soviet scientists reanimating a dead cat. [ 19 ] According to Neil Cicierega in the audio commentary for the 2016 Lemon Demon album Spirit Phone , the first track on the album ("Lifetime Achievement Award") was originally titled "Experiments in the ...
One month into his stay at the NICU at M Health Fairview Masonic Children's Hospital, Cooper got a neighbor, Raghu, who weighed even less than him. The parents quickly connected.
Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are native to the temperate and tropical regions. [2] [3] The genus was named by Linnaeus in 1758 after the Hydra, which was the many-headed beast of myth defeated by Heracles, as when the animal has a part severed, it will regenerate much like the mythical hydra's heads.