Polychaete+Worm

=Polychaete Worm = =__Scientific Name:__ // Myrianida pachyce // =

__Size: __ segmented worms, generally less than 10 centimetres
==__Description of Habitat:__ They can live in the coldest ocean temperatures of the abyssal plain, and can tolerate the extreme high temperatures near hydrothermal vents. They live under rocks, in coral crevices, in abandoned shells or burrow into the mud or sand == ==__Living Requirements:__ They are free-living, and they live within sands or muds. Some polychaete worms have developed a different strategy to avoid being eaten�they live  inside a tube, which they make themselves. == ==__Life Cycle:__ The reproductive organs of the female release the eggs into her body cavity and complete there maturation. The female will then release them into the surrounding water through a small hole in her body, or by rupturing her body, which would result in death. Sperm from the male worms will find the eggs and fertlize them as they float amongst the plankton. Then the fertilzed eggs will float until they hatch. Then the larvae will complete their development by adding segments. ==

__Male/Female Differences: __ They are hemaphrodites, so they don't have any differences.
==__Interesting Facts:__ Polychaetes are often called bristleworms because each of the body segments has an upper and lower bundle of bristles on each side. The polychaetes are the largest and most primitive class of annelids, with more than 5300 described species, most of them marine. ==