Dataset

A photographically-vouchered global citizen science dataset of sea slugs (Mollusca: Heterobranchia) from the SEASLUG.WORLD platform since 2015

OBIS Japan Open in mapper Explore occurrences

This dataset comprises occurrence records on sea slugs, collected from divers worldwide via the online platform "Sekai no Umiushi" (https://seaslug.world/) since 2015. Data collection remains ongoing, and the dataset currently includes approximately 40,000 records. It broadly covers groups within the Heterobranchia commonly known as "sea slugs," including not only nudibranchs (Nudibranchia) but also sea hares (Aplysiida), headshield slugs (Cephalaspidea), and sap-sucking slugs (Sacoglossa). The key feature of this dataset is that every record is accompanied by a high-resolution photograph that serves as the basis for identification. All species identifications are consistently performed by the project administrator based on these photographs, ensuring high taxonomic accuracy and consistency throughout the entire dataset. Each record includes a scientific name, vernacular name, geographic coordinates, event date, depth, and a URL to the photograph. This dataset, underpinned by photographic evidence, provides valuable contributions to studies on sea slug biogeography, understanding of diversity patterns, and marine biodiversity monitoring research through citizen science.

Citation: Kimoto, N. (2025) A photographically-vouchered global citizen science dataset of sea slugs (Mollusca: Heterobranchia) from the SEASLUG.WORLD platform since 2015. Available at https://doi.org/10.48518/00032. Accessed on yyyy-mm-dd.

Published: September 25, 2025 at 11:29

URL: https://www.godac.jamstec.go.jp/ipt/resource?r=seaslug-world_kimoto

Nobuhiko Kimoto

38,653
occurrence records
1,215
taxa
979
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 108
0.3%
maximumDepthInMeters 2,544
6.6%
minimumDepthInMeters 2,544
6.6%
scientificNameID 12 10
0.1%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
ON_LAND 6,141
15.9%
DEPTH_EXCEEDS_BATH 4,593
11.9%
NO_DEPTH 2,544
6.6%
NO_ACCEPTED_NAME 30
0.1%
NO_MATCH 22
0.1%

Measurement types

DNA derived data