| Hydroides ezoensis | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Annelida |
| Class: | Polychaeta |
| Family: | Serpulidae |
| Genus: | Hydroides |
| Species: | H. ezoensis |
| Binomial name | |
| Hydroides ezoensis Okuda, 1934 [1] | |
Hydroides ezoensis is a species of tube-forming annelid worm in the family Serpulidae. It is native to the temperate northern Pacific and the central Indo-Pacific and is found in the intertidal zone and on submerged rocks, shells, pilings, jetties and boats.
Hydroides ezoensis secretes a robust, white, calcareous tube that may be 20 mm (0.8 in) long after a year, with a diameter of about 3 mm (0.1 in); this starts off flattened against the surface, but later grows upwards. Various particles may get incorporated into the tube, and the older parts may be greenish from the growth of algae. From the tube, the crown of radioles projects, consisting of two semi-circular whorls, each of up to 26 branched tentacles. These are purplish, banded with white, orange, tan or brown. The first dorsal pair of tentacles is unbranched and is modified to form a pseudoperculum, which can be used to close the tube after the worm has retracted inside. [2]
The species is native to the temperate northern Pacific and the central Indo-Pacific. [3] It was first described in 1934 from the waters around Japan; the specific epithet refers to Ezo, the historic name for the island of Hokkaido. [1] Since then it has appeared and become established in the waters around Great Britain, [4] and in those around Australia. It occurs in estuaries and bays, on hard substrates including rocks, seaweed, shells, pilings, docks, jetties, buoys and boats. It is a common fouling organism of vessels, docks, industrial water intakes and aquaculture facilities, and sometimes grows on muddy gravel substrates. [3]
The calcareous tube secreted by the worm is a refuge into which it can retreat; these tubes sometimes form large aggregations. Like all serpulids, H. ezoensis is a filter feeder, extending its crown of tentacles into the water column to catch plankton and organic particles floating past. Two species of parasitic copepod are associated with this worm, and the dense mass of tubes provides suitable habitat for protozoans, poriferans, bryozoans, other polychaete worms and amphipods. [3]
The sexes are separate in this species, and gametes are released into the sea where fertilisation occurs. The worms coordinate their reproductive processes by the production of pheromones which indicate their readiness to breed. The larvae are planktonic and are induced to settle and undergo metamorphosis by chemical cues released by the bacterial biofilm on the substrate. A rock on which tubeworms of this species already live is a more attractive place to settle than a new, clean surface. [2]
The Serpulidae are a family of sessile, tube-building annelid worms in the class Polychaeta. The members of this family differ from other sabellid tube worms in that they have a specialized operculum that blocks the entrance of their tubes when they withdraw into the tubes. In addition, serpulids secrete tubes of calcium carbonate. Serpulids are the most important biomineralizers among annelids. About 300 species in the family Serpulidae are known, all but one of which live in saline waters. The earliest serpulids are known from the Permian.
Hydroides is a genus of tube-forming serpulid worms found on submerged saltwater rocks, shells, and boats in many coastal areas around the world.
Bispira brunnea, the social feather duster or cluster duster, is a species of marine bristleworm. They tend to live in groups of individuals, and are common off the Caribbean islands in southeast North America. The feather duster has one crown of various colors, however, the color of the crown seems to be consistent within individual colonies.
Serpula is a genus of sessile, marine annelid tube worms that belongs to the family Serpulidae. Serpulid worms are very similar to tube worms of the closely related sabellid family, except that the former possess a cartilaginous operculum that occludes the entrance to their protective tube after the animal has withdrawn into it. The most distinctive feature of worms of the genus Serpula is their colorful fan-shaped "crown". The crown, used by these animals for respiration and alimentation, is the structure that is most commonly seen by scuba divers and other casual observers.
A radiole is a heavily ciliated feather-like tentacle found in highly organized clusters on the crowns of Canalipalpata. Canalipalpata is an order of sessile marine polychaete worms consisting of 31 families. These benthic annelid tube worms employ radioles primarily for alimentation. While their primary role is to function as an organ for filter feeding, radioles also serve as respiratory organs. Because of their role in gas exchange, radioles are often referred to as "gills".
Pomatoceros triqueter is a species of tube-building annelid worm in the class Polychaeta. It is common on the north eastern coasts of the Atlantic Ocean and in the Mediterranean Sea.
Hydroides norvegica is a species of tube-forming annelid worm in the family Serpulidae. It is found on submerged rocks, shells, piles and boats in many coastal areas around the world. It is the type species of the genus Hydroides.
Spirorbis borealis is a sedentary marine polychaete worm in the Serpulidae family. It is commonly called the sinistral spiral tubeworm and is the type species of the genus Spirorbis.
Sabellastarte spectabilis is a species of benthic marine polychaete worm in the Sabellidae family. It is commonly known as the feather duster worm, feather duster or fan worm. It is native to tropical waters of the Indo-Pacific but has spread to other parts of the world. It is popular in aquariums because of its distinctive appearance and its ability to remove organic particles and improve water quality.
Kuphus is a genus of shipworms, marine bivalve molluscs in the family Teredinidae. While there are four extinct species in the genus, the only extant species is Kuphus polythalamius. It is the longest bivalve mollusc in the world, where the only known permanent natural habitat is Kalamansig, Sultan Kudarat in the Philippines.
Megabalanus coccopoma, the titan acorn barnacle, is a tropical species of barnacle first described by Charles Darwin in 1854. Its native range is the Pacific coasts of South and Central America but it is extending its range to other parts of the world.
Sabella spallanzanii is a species of marine polychaete worms in the family Sabellidae. Common names include the Mediterranean fanworm, the feather duster worm, the European fan worm and the pencil worm. It is native to shallow waters in the northeastern Atlantic Ocean and the Mediterranean Sea. It has spread to various other parts of the world and is included on the Global Invasive Species Database.
Ficopomatus enigmaticus, commonly known as the Australian tubeworm, is a species of serpulid tubeworms. Their true native range is unknown, but they probably originated in the Southern Hemisphere, perhaps from the Indian Ocean and the coastal waters of Australia. Today they have a cosmopolitan distribution, having been introduced to shallow waters worldwide. The Australian tubeworm is an invasive species that dominates and alters habitats, reduces water quality, depletes resources, and causes biofouling.
Cerianthus membranaceus, the cylinder anemone or coloured tube anemone, is a species of large, tube-dwelling anemone in the family Cerianthidae. It is native to the Mediterranean Sea and adjoining parts of the northeastern Atlantic Ocean.
Phoronis australis is a species of marine horseshoe worm in the phylum Phoronida. It is found in shallow warm-temperate and tropical waters in the eastern Atlantic Ocean and the Indo-Pacific region and was first detected in the Mediterranean Sea in the late twentieth century. These worms live in association with tube-dwelling anemones, particularly those in the genus Cerianthus.
Salmacina dysteri is a species of tube-forming annelid worm in the family Serpulidae. It is found on submerged rocks, reefs, piles and boats in many shallow and deeper water environments around the world.
Hydroides elegans is a species of tube-forming serpulid worms. It is a harbour fouling invasive species, in contrast with Hydroides norvegica with which it is sometimes confused.
Synaptula recta, sometimes known as the gut-like sea cucumber, is a species of sea cucumber in the family Synaptidae in the phylum Echinodermata. It occurs in shallow water in the tropical Indo-Pacific region.
Serpula columbiana, variously called the calcareous tubeworm, the plume worm, the fan worm, the limy tube worm and the red tube worm, is a species of segmented marine polychaete worm in the family Serpulidae. It is a cosmopolitan species that is found in most seas in the Northern Hemisphere including the Atlantic Ocean, the Pacific Ocean and the Indian Ocean.
Spirobranchus cariniferus, commonly known as the blue tubeworm or spiny tubeworm, or by its Māori name toke pā, is a species of tube-building polychaete worm endemic to New Zealand.