Description: Thin crust, to 20+cm2 Red, orange-red. Hard to determine; "comes away in scraps". Oscules large, distinct, with slightly raised rims, at centre of system of conspicuous, convergent, sub-surface channels.

Habitat: Vertical rock surfaces in regions of considerable water movement. Also Aequipecten valves, stones, etc. Littoral, infra- and circalittoral.

Distribution: Channel, Atlantic, Mediterranean. Known recently from Anglesey, Calf of Man, SW and NE Ireland, Azores.

Distribution Map from NBN: Microciona strepsitoxa at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Microciona strepsitoxa at iNaturalist World Species Observations database.