Edwardsia ivelli

Researched By	Angus Jackson	Data Supplied By	MarLIN
Refereed by	Dr Simon K. Davy
Taxonomy
Scientific name	Edwardsia ivelli	Common name	Ivell's sea anemone
MCS Code	D768	Recent Synonyms	None
Phylum	Cnidaria	Subphylum
Superclass	Anthozoa	Class	Hexacorallia
Subclass		Order	Actiniaria
Suborder	Nynantheae	Family	Edwardsiidae
Genus	Edwardsia	Species	ivelli
Subspecies
Additional Information	No text entered
Taxonomy References	Howson & Picton, 1997, Howson & Picton, 1997, Manuel, 1988, Sheader & Sheader, 1990, Manuel, 1975
General Biology
Growth form	Vermiform unsegmented	Feeding method	Passive suspension feeder
Mobility/Movement	Burrower, Temporary attachment	Environmental position	Infaunal
Typical food types	No text entered	Habit	Burrow dwelling
Bioturbator	Not relevant	Flexibility	High (>45 degrees)
Fragility	Fragile	Size	Small(1-2cm)
Height	Not relevant	Growth Rate	Insufficient information
Adult dispersal potential	Insufficient information	Dependency	Independent
Sociability	Solitary
Toxic/Poisonous?	No
Additional Information	No text entered
Biology References	Manuel, 1988, Sheader & Sheader, 1990, Manuel, 1975, Anonymous, 1999(d)
Distribution and Habitat
Distribution in Britain & Ireland	Widewater lagoon, West Sussex.
Global distribution	Widewater lagoon, West Sussex, England.
Biogeographic range	Not researched	Depth range	<1 m
Migratory	Non-migratory / Resident
Distribution Additional Information	This species has not been recorded since 1983. Three surveys have since failed to record this species. It may be that it exists in such low numbers that rediscovery in surveys is unlikely. Additionally, the conditions in the lagoon have varied considerably over the last 20 years. Water levels have fallen as a result of little seawater input, the remaining water is hypersaline. Areas of the lagoon basin have become exposed, subsequently changes in the lagoon community have been recorded. It has been suggested that this species may now be extinct.
Substratum preferences	Mud	Physiographic preferences	Isolated saline water (Lagoon)
Biological zone	Lagoonal	Wave exposure	Not relevant, Ultra Sheltered, Extremely Sheltered
Tidal stream strength/Water flow	Very Weak (negligible)	Salinity	Not relevant, Insufficient information
Habitat Additional Information
Distribution References	Manuel, 1988, Sheader & Sheader, 1990, Manuel, 1975
Reproduction/Life History
Reproductive type		Developmental mechanism
Reproductive Season	Insufficient information	Reproductive Location	Insufficient information
Reproductive frequency	Insufficient information	Regeneration potential	No
Life span	Insufficient information	Age at reproductive maturity	Insufficient information
Generation time	Insufficient information	Fecundity	Insufficient information
Egg/propagule size	Insufficient information	Fertilization type	Insufficient information
Larvae/Juveniles Larval/Juvenile dispersal potential Insufficient information Larval settlement period Insufficient information Duration of larval stage Insufficient information
Additional Information	No text entered
Reproduction References