Anthopleura elegantissima

Andy Horton British sea anemones, notably Urticina felina can be seen to inflate, detach themselves and allow themselves to be carried to new locations. This is from aquarium study in response to unsuitable environmental conditions, usually too high water temperatures with the Dahlia Anemone. .

Cynthia D. Trowbridge Anthopleura elegantissima (Pacific) does this all the time as well

Christian Skauge Do you have the Stomphia coccinea in the UK as well? This species swims as well, especially if a spiny starfish comes along...

Bernard Picton We do find them, from Northern Ireland northwards. Haven't seen any in recent years here in Northern Ireland but they were in stony, current swept habitats where we haven't been doing much diving recently. In Scotland I've seen them on shells in more sheltered, sea loch conditions.

Christian Skauge They tend to be in a little more exposed places here as well. Quite small, but very beautiful - and with really interesting behaviour.