[3] It is endemic to a single location, Widewater Lagoon in West Sussex, England, where it was first discovered by Richard Ivell.

Each tentacle has a few transverse bars of pale cream occasionally forming complete rings.

[citation needed] Burrowing in soft mud in saline lagoons or sheltered creeks, it is a tiny species and easily overlooked unless deliberately sought.

[citation needed] It is endemic to England known from only one site, Widewater Lagoon in West Sussex, the type locality.

Searches in recent years have failed to find any specimens and the species is considered extinct by some conservationists [4] Although the type of locality inhabited by this species is not often searched by divers, such places are well-worth investigating.