On Record
Field documentation from Southeast Asia - a region rich in biodiversity and thin in records. Identified through available references and specialist input, to the highest taxonomic level the evidence allows.
The images are not always perfect. What they show, though, always will be.
Cycnotrachelus satelles · Vietnam · 2024 | Female specimen of one of the rarest documented leaf-rolling weevils in the region. This photograph accounts for one of only six records on iNaturalist.
Narcine baliensis · Indonesia · 2012 | Described in 2016 and listed as Near Threatened on the IUCN Red List. The Indonesian Numbfish is a rarely encountered electric ray with only four records on iNaturalist.
Beauchampius indosinicus · Vietnam · 2025 | A terrestrial flatworm that passes through the world almost unnoticed. One of only four photographs recorded on iNaturalist.
Thaumoctopus mimicus · Singapore · 2014 | The only recorded observation of this species in Singapore waters. Documented by the Lee Kong Chian Natural History Museum, Singapore.
Hemiphyllodactylus cattien · Vietnam · 2025 | Formally described as a new species in 2023. This is the only iNaturalist record, and likely among the first field photographs of a living specimen.
Dichelaspis orthogonia · Indonesia · 2014 | Barnacles are not glamorous. This one has been photographed once on iNaturalist.
Nectonema melanocephalum · Indonesia · 2013 | A parasitic horsehair worm, photographed here inside its living shrimp host. One of only two records on iNaturalist globally.
Genus Vanvoorstia · Indonesia · 2022 | Tentatively identified as V. coccinea, a rarely documented alga. One of only three iNaturalist observations globally.
Trichogorgia muzikae · Singapore · 2024 | Described in 2019, probably widespread but seldom observed. All four iNaturalist records of this species belong to this photographer.
Family Calvulariidae · Singapore · 2024 | An octocoral specialist flagged this colony as unlike anything previously documented in the region - possibly a species not yet described. As the specialist noted, there are probably many small, inconspicuous octocorals that have yet to be described from this sort of silty, coastal habitat.
Note: 1)Taxonomic identifications reflect the best available knowledge at time of observation, verified where possible through field references and specialist input. 2) iNaturalist observation counts reflect platform coverage and do not represent global abundance, and are accurate as of 16 April 2026.