The idea that a museum in South Kensington, which is more well-known for its Victorian arches and dinosaur skeletons, would one day decide to create a phone app for those who research the deepest, darkest regions of the ocean is subtly lovely. Deep Sea ID isn’t very eye-catching. It makes no effort to be. However, once you realize what it does, it begins to seem like one of those little, practical inventions that ought to have been around years ago.
The World Register of Deep-Sea Species, a taxonomic database that was introduced in December 2012 as part of a larger scientific endeavor to map what lives down there, is paired with the app. The relationship between WoRDSS and the broader World Register of Marine Species is genuinely collaborative rather than performative. Editors correct mistakes, add images, and update entries. It’s the kind of meticulous, slow work that seldom makes headlines.
| App Name | Deep Sea ID |
| Developed By | Natural History Museum (London), National Oceanography Centre, World Register of Marine Species |
| Linked Database | World Register of Deep-Sea Species (WoRDSS) |
| Launch of WoRDSS | December 2012 |
| Species Covered | More than 25,000 |
| High-Resolution Images | Over 350 |
| Initial Funding | INDEEP (International Network for Scientific Investigation of Deep-sea Ecosystems) |
| Downloads | More than 30,000 |
| Depth Criterion for Inclusion | Samples recorded below 500m |
| Access Type | Offline, free |
| Primary Audience | Researchers, contractors, educators, science communicators |
The offline component is what makes Deep Sea ID intriguing. The sensation of having a dying signal and a sample tray full of unknowns after a connection drops somewhere beyond the continental shelf is familiar to anyone who has worked on a research vessel. A marine biologist crouched over a microscope in a rolling ship’s lab doesn’t need to wait for a satellite link to identify an intriguing-looking polychaete worm because the app stores everything locally, including over 25,000 species and over 350 high-resolution photos.
The pictures themselves are powerful and occasionally unnerving. The so-called Yeti crab, Kiwa hirsuta, has peculiarly furry claws. David Shale took a picture of Atolla wyvillei, a deep-sea jellyfish that glows in a way that almost seems staged.
You begin to realize how little we truly know about the creatures that coexist with us on this planet as you scroll through these specimens. It’s difficult to avoid experiencing a slight sense of humility.
The definition of “deep sea” is not as clear-cut as you might think. The boundary was traditionally defined by the continental shelf break at about 200 meters, but more recent classifications push that line lower. In part, WoRDSS uses 500 meters as its working threshold because that is the depth at which seasonal temperature variations diminish and sunlight virtually disappears. Ecological overlap is important because some of the species in the database aren’t strictly deep-sea natives; they just happen to wander down occasionally.
When you consider it, it makes sense that Deep Sea ID was the first app created by the Science Group of the Natural History Museum. Specimens were placed behind glass in museums for decades. They are now putting them in their pockets. With over 30,000 downloads, the app isn’t viral by app store standards, but it’s a respectable footprint for a tool targeted at graduate students, taxonomists, and the occasional very enthusiastic teacher.
As this kind of project develops, it seems that scientific software doesn’t always need to pursue scale. Sometimes the only objective is to make a challenging task marginally easier for those performing it. With that idea in mind, INDEEP provided funding for the initial iOS version, and the collaboration between the museum, the National Oceanography Centre, and the WoRMS team kept the project grounded.
The extent to which the general public will embrace something this specialized is still unknown. Most likely not at all. However, that might not be relevant. In a sense, Deep Sea ID is the most honest form of science communication because it is available to those who need it.
