User:TrevellP/Spirobranchus corniculatus

= Article Drafting: Spirobranchus corniculatus = Comments by A. Faucci (Apr 3, 2024):

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Lead
Spirobranchus corniculatus, commonly referred to as the Indo-Pacific Christmas tree worm, belongs to the family Serpulidae and is a species of tube-building annelid fanworms. Belonging to the class Polychaeta, they are recognized for their bristle-like tentacles and the presence of a structure called radioles. It is widely encountered and recognized for its unique resemblance to a conifer and its diverse array of colors. Initially presumed to be part of a species group including Spirobranchus cruciger and Spirobranchus gaymardi, it has been determined to be a singular, morphologically adaptable species inhabiting the Central Indo-Pacific region.

Description
The Christmas tree worm is very vibrant in color and changes its color based on depth, camouflage, and a scare tactic. It has bright spiral rings around its body segments or radioles, which can even number more than 200 segments. The body of the Serpulidae is abnormally large, ranging up to 45 mm long and 0.5 mm wide.

Biology
The species within the Spirobranchus corniculatus class predominantly engage in reproduction throughout their lifespan. During mating, females emit a pheromone that attracts and signals males to release sperm. In turn, females release eggs; this action is called spawning. The life cycle of Polychaeta commences with egg development into larvae, characterized by an elongated body, which will then reach juvenile stages. Eventually, after a while, they reach the end of their lifespan. They also use their color to attract females and use their mesmerizing color to make predators second guess their meal. Regarding their diet, they primarily consume suspended food particles, phytoplankton, and microalgae.

Distribution and Habitat
Spirobranchus corniculatus can be found in the tropical Indo-Pacific, specifically in corals such as (Porites lobata), which are typically found in Hawaiian waters. The Christmas tree worm inhabits depths of up to 3-30 meters and can also be found living in almost every species of coral. It is mostly encountered in the eastern side of the globe, spanning Southeast Asia, the Indian Ocean, the central Pacific, and the northern region of Australia.