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Obelia dichotoma   (Linnaeus, 1758)

sea thread hydroid

Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Obelia dichotoma   AquaMaps   Data sources: GBIF OBIS
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Image of Obelia dichotoma (sea thread hydroid)
Obelia dichotoma
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drawing shows typical fish in this Family.

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Hydrozoa | Leptothecata | Campanulariidae

Environment / Climate / Range Ecology

Sessile; brackish; depth range 0 - 275 m (Ref. 116013).  Polar

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Arctic, Atlantic, Indo-Pacific. Mostly polar, but also in subtropical, tropical, temperate and boreal climates.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm

Biology     Glossary (e.g. epibenthic)

Colonial (Ref. 19). Known from mangroves (Ref. 86642), tidal inlets, sheltered areas of bays, exposed areas of bays, including any ledges at their entrance, sounds, caves, still-water areas of anchialine ponds, shallow reefs, shallow coastal benthic habitats (< 25 m), deeper coastal substrates (25- 100m) of the offshore fore-reef slope and surface or near surface water layers, including porpitids and the halopelagic Sargassum fauna (Ref. 86643). Also found in Carrie Bow Cay, Belize, in patch reefs, mangrove islands, Thalassia beds, sand trough, outer ridge and fore-reef slopes on Thalassia beds, mangrove roots, floating Sargassum and substrates composed of dead corals and gorgonians at depths of 0.2 to 31 m ) (Ref. 87156). It is found mainly on hard substrates, wood, ropes, dead gorgonians and smaller colonies are epizoic to Symplectoscyphus spp., Bougainvillia muscus, Sertularella polyzonias, Hybocodon chilensis (Ref. 87801). As with other hydroids, this species exhibits a pelagic medusiod stage (Ref. 87156). Benthic suspension feeder. Feeds mainly of facal pellets, organic matter, microalgae, and some zooplankton (Ref. 116236). Species exhibits both asexual and sexual reproduction by budding during hydroid stage and release of gametes in medusae stages (Ref. 1663, p. 23, 28). Period of reproductive maturity recorded for Carrie Bow Cay, Belize is 12th of April, during which the sample collected had gonophores or medusa buds (Ref. 87156).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Species exhibits both asexual and sexual reproduction by budding during hydroid stage and release of gametes in medusae stages (Ref. 1663, p. 23, 28). Period of reproductive maturity recorded for Carrie Bow Cay, Belize is 12th of April, during which the sample collected had gonophores or medusa buds (Ref. 87156).

Main reference References | Coordinator | Collaborators

Migotto, A.E., A.C. Marques, A.C. Morandini and F.L. da Silveira. 2002. (Ref. 813)

IUCN Red List Status (Ref. 115185)

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses


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More information

Common names
Synonyms
Predators
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Morphology
Larvae
Abundance
References
Mass conversion

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | GenBank (genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | ispecies | PubMed | Scirus | Tree of Life | uBio | uBio RSS | Wikipedia (Go, Search) | Zoological Record

Estimates of some properties based on models

Price category (Ref. 80766)
Unknown