1844- Ongoing Verified Marine records from Indicia-based surveys, United Kingdom.

Records collected voluntarily and uploaded via indicia based web recording sites including iSpot, Irecord, Marine Sightings Network and Sealife Survey. iSpot records are recorded by members of the public wishing to have identifications confirmed and records from iRecord and the MBA Recording scheme are reported sightings from a wide range of recorders. Data include a subset of iSpot records: www.ispotnature.org, those submitted via iRecord: www.brc.ac.uk/irecord and the MBA Indicia-based recording scheme: www.mba.ac.uk/recording. Records are verified by organisations and individuals with relevent taxonomic Expertise. This includes the Marine Biological Assocation and the Conchological Society.