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Marine deep sea polychaetes under the genus Osedax will colonize at whale falls in many different oceans, using a symbiont that can digest the bones within the carcasses (Jones et al,2007) This earned them the common name of "boneworms," and they are speculated to be a keystone species of these types of environments due to lack of organisms in ...
At the time, the presence of thermal springs near the midoceanic ridges was known. Further research uncovered aquatic life in the area, despite the high temperature (around 350–380 °C). [5] [6] Many samples were collected, including bivalves, polychaetes, large crabs, and R. pachyptila. [7] [8] It was the first time that species was observed.
The first body segment (segment number 1) features both the earthworm's mouth and, overhanging the mouth, a fleshy lobe called the prostomium, which seals the entrance when the worm is at rest, but is also used to feel and chemically sense the worm's surroundings. Some species of earthworm can even use the prehensile prostomium to grab and drag ...
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This form of activity is often considered a way to escape floods and waterlogged burrows. However, this cannot be the case since L. terrestris, like other earthworms, can live in oxygenated water for long periods of time, stretching to weeks. Under less severe environmental conditions where air temperature and moisture are sufficient, the worm ...
Oligochaetes are well-segmented worms and most have a spacious body cavity (coelom) used as a hydroskeleton.They range in length from less than 0.5 mm (0.02 in) up to 2 to 3 metres (6.6 to 9.8 ft) in the 'giant' species such as the giant Gippsland earthworm (Megascolides australis) and the Mekong worm (Amynthas mekongianus).
The majority of siphonophores live in the deep sea and can be found in all of the oceans. [11] Siphonophore species rarely only inhabit one location. [11] Some species, however, can be confined to a specific range of depths and/or an area of the ocean. [11]
Eulagisca gigantea is a species of scale worm commonly known as the Antarctic scale worm. [2] This species is specifically found in the deep-sea in cold waters like the Antarctic Ocean.