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Personal information
The "Finding Sea Slugs!" project, funded by the Environment and Conservation Fund, is coordinated by Marine Molecular Ecology & Evolution Lab (MMEE lab) at the Simon F.S. Li Marine Science Lab, The Chinese University of Hong Kong. It is a citizen scientist program which aims to harness the power of the general public to collect data on sea slug species recorded in Hong Kong waters, in order to update our sea slug species checklist and online database. The project is expected to last for two years until Jan 2026.
Through collecting sea slugs observation record from the public, we hope to analyze and conform the common sea slug species and their distribution hotspots in Hong Kong. We would then make use of these data to create an online sea slug photo database for the public to look up for the information of these animals and their identities. By submitting your observation data and photos of sea slugs in Hong Kong waters on this page, you can contribute to the sea slug research in Hong Kong! Observation records are not limited to any specific year, you might submit past records.
The data collected through this project will only be used in aggregate form for display, reporting, and publications. No personally identifiable information will be shared with any other organization or group. Please refer to the data privacy statement below the questionnaire.
Observation details
* Mandatory
Sea slug(s) encountered
Please choose the sea slug(s) you encountered and their quantities in the particular dive (If you are unsure of the identification, please check "Others").

Unidentia aliciae

Polycera sp.

Phyllidia ocellata

Caloria militaris

Kaloplocamus acutus

Hypselodoris festiva

Gymnodoris inornata

Gymnodoris alba

Goniobranchus tumuliferus

Goniobranchus sinensis

Elysia obtusa

Diaphorodoris sp. 2

Diaphorodoris sp. 1

Dendrodoris arborescens

Dermatobranchus sp. 2

Dermatobranchus sp. 1

Chromodoris orientalis

Ceratodoris hiroi

Bermudella japonica

Aplysia nigrocincta
Photo credits: Fu Ka Wing
Hong Kong Sea Slugs data collection
(You can only upload one photo for each item below. If you wish to submit more than six photos, you might email them to lmtsanglab@gmail.com, stating your name, the date, the number of sea slugs observed, the location, and the depth of observation. If you want to inquire about the identifications of the sea slugs, you can also upload the photos below and label the file name as "ID needed". We will email you a reply.)
Others
Please select the number observed and what the sea slug is attached to.