About 135.5 m (= 451 feet). Depth of "843 m" in the text is a lapsus (Andrey Sikorski, pers. comm., 2018-05-11).
Sikorski, Andrey; Pavlova, Lyudmila. (2018). Two new species of Laonice (Norgensia) (Spionidae, Polychaeta) from subtropical Atlantic and subequatorial Pacific coasts of North America. Zootaxa. 4418(2): 171-178. available online athttps://biotaxa.org/Zootaxa/article/view/zootaxa.4418.2.6