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This sea anemone tends to expand in darkness (observations in home aquaria).
Very difficult to detach from rocks and groynes
to which it is fastened, and the anemone has a 50% chance of being fatally
damaged if removed this way. Despite this strong adherence the anemone's
appearance intertidally are infrequent, and congregations of this anemone
may all move to a new location the following day.
Similar species: Sagartiogeton laceratus
Notes: Sagartiogeton viduatus is not a synonym but a different
No reproduction activity has been observed in captivity. However, my
observations on the shore indicate small colonies from 2 to 12 possibly
more of this sea anemone in March and April, although usually only occasional
single specimens are discovered, usually in spring or autumn (Sussex coast).
Sagartiogeton undatus is very common on
the shores of the Netherlands, especially in the estuaries of the southern
part. much of what I know about this species can be read in my book on
the Dutch sea anemones (Bloemdieren, de zeeanemonen en hun verwanten van
de Nedelandse kust, ISBN 90-803595-1-3). Your Belgian contact may be able
to read it as it is Dutch, of course. if you tell him or her to contact
me I may be able to advise on the easiest and cheapest way to get a copy.
I have kept specimens of S. undatus in
my aquarium over a period of 30 years. As far as reproduction is concerned
I witnessed the release of eggs only once. I never saw asexual reproduction.
Kingston Beach, Shoreham-by-Sea
Carrion, small invertebrates.
Philip Henry Gosse christened this species the Snakelocks, but this
name proved popular with the commoner species Anemonia
Information wanted: Please send any records of this sea anemone,
with location, date, who discovered it, how it was identified, prevalence,
common name and any other details to
Shorewatch Project EMail email@example.com.
All messages will receive a reply.