Overview

Brief Summary

Biology

polyp colonial; medusa in planktonic
  • UNESCO-IOC Register of Marine Organisms
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Source: World Register of Marine Species

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Distribution

The Mediterranean records are improbable to erroneous
  • Schuchert, P.
Creative Commons Attribution 3.0 (CC BY 3.0)

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Source: World Register of Marine Species

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Physical Description

Diagnostic Description

Diagnosis

Medusa jelly thick; no peduncle, basal trunk of oral tentacles long, ocelli crescentic or oval, often appearing almost linear in oral view, situated adaxially on bases of tentacles, not on bulbs, 12-17 tentacles per bulb, oral tentacles branch 4-5 times; polyp stolonal or sparingly branched, long pedicels, medusae buds in clusters on branched stalks, young medusa with very narrow subumbrella.
  • Schuchert, P. 2007. The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera part 2. Revue suisse de Zoologie 114: 195-396
Creative Commons Attribution 3.0 (CC BY 3.0)

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Source: World Register of Marine Species

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Ecology

Habitat

Depth range based on 9 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 0 - 40
  Temperature range (°C): 7.682 - 7.682
  Nitrate (umol/L): 3.124 - 3.124
  Salinity (PPS): 34.708 - 34.708
  Oxygen (ml/l): 6.095 - 6.095
  Phosphate (umol/l): 0.453 - 0.453
  Silicate (umol/l): 3.113 - 3.113

Graphical representation

Depth range (m): 0 - 40
 
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Wikipedia

Bougainvillia britannica

Bougainvillia britannica is a marine invertebrate, a species of hydroid in the suborder Anthomedusae.

Contents

Description

The polyp grows singly from a stolon or has a few branches. It has long pedicels and medusa buds develop in clusters on branched stalks. The young medusae have very narrow subumbrellas.

The medusa has thick jelly and no peduncle. The four oral tentacles are long and branch four or five times as the medusa grows, and the oval ocelli are situated on the base of the tentacles. There are four bulbs on the margin of the umbrella with 12 to 17 tentacles on each bulb.[1]

Distribution and habitat

B. britannica is found in the north east Atlantic Ocean and the North Sea, particularly round the shores of Britain and Ireland, Belgium and the Netherlands. A record from the Mediterranean Sea is believed to be a misidentification.[1]

Biology

The B. britannica hydroid buds and forms medusae by asexual reproduction. When these mature, sexual reproduction occurs, the fertilised eggs settle out and new hydroids are formed.

References

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