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Elapidae · Philippine record

Plain Seasnake

Hydrophis inornatus(GRAY 1849)

Length
Length not yet addedAtlas entry awaiting completion
Venom status
VenomousHuman effects: atlas summary awaiting completion
Known venom effects
Effects not yet summarised in this atlas
Size & venom sources

Venom: Basic classification explicitly recorded in the species account. Detailed effects and medical significance have not yet been summarised here.

Species account, Comments

Venom effects and medical significance are different from toxicity rankings. Do not handle a snake on the basis of this summary.

The account records a marine habitat. Island names on the map identify reported coastal areas; they are not land occupancy or a boundary of the species’ marine range. Its atlas account links 1 named island or island-group record to the source literature.

OccurrenceConfirmed
Islands named1
Natural history4 sourced topics
References3

Literature updated 2026-10-07 · Editorial review pending

Explore the island records ↓

Species portrait

Hydrophis inornatus

Image to follow
Reserved for a contributor imageCredit and usage rights will accompany the image.

The illustrated collection

Adult & juvenile

Adult · study plate

Hydrophis inornatus

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Reserved for a contributor imageCredit and usage rights will accompany the image.

Juvenile · study plate

Hydrophis inornatus

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Reserved for a contributor imageCredit and usage rights will accompany the image.

Life stages will be labelled from the contributor’s information. Images alone do not establish identification or a locality record.

Media provenance

Every image carries its source.

Contributor images are forthcoming. Photographs and illustrations will retain their individual credits, permissions and evidence notes.

A closer look

Natural history & identification

Taxonomic context

Older literature may use Chitulia inornata. Reports from Australia have been questioned as misidentifications; records should be interpreted within their geographic and taxonomic context.

Evidence & scope

Literature documented · Comment: nomenclature and distribution

Species-level database summary; literature review, not expert validation.

The cited account does not establish population-wide variation or the conditions at every Philippine locality.

Reproduction

The species account records live-bearing reproduction, using the term ovoviviparous. A verified Philippine litter-size range and reproductive calendar are not established here.

Evidence & scope

Literature documented · Reproduction field

Reproductive mode reported for this named species.

Mode alone does not establish litter or clutch size, seasonal timing, or captive husbandry requirements.

Ecology & habitat

The account records a marine habitat. Island names on the map identify reported coastal areas; they are not land occupancy or a boundary of the species’ marine range.

Evidence & scope

Literature documented · Comment: Habitat

Species-level database summary; literature review, not expert validation.

The cited account does not establish population-wide variation or the conditions at every Philippine locality.

Philippine distribution

The atlas records Hydrophis inornatus from these named Philippine areas: Panay. These are literature areas rather than a continuous range boundary.

Evidence & scope

Literature documented · Existing checklist occurrence statement and distribution review

The original evidence level is retained.

A country listing cannot establish an island or a precise locality.

Across the archipelago

Where this species is recorded

Philippines
Hydrophis inornatus — all named islandsPanay

Coastal records: blue outlines

Blue outlines locate coastal records, not land occupancy or marine range boundaries.

Philippine distribution

Documented places

1 named island / island group

Select an island to read its distribution record and sources. Uncoloured islands are not evidence of absence.

Distribution record & sources

South Chinese Sea (Philippines: Panay etc.), China (Tsingtau), Sri Lanka (fide WALL 1921), Indonesia (Java) [Schmidt 1852], Thailand, Australia (Torres Strait) Type locality: Indian Ocean

References attached to this species account. Island-specific evidence is shown separately where available.

The Reptile Database — species checklist, 17 June 2026 ↗

Synopsis of the Snakes of the Philippines: A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature ↗

Hydrophis inornatus — The Reptile Database species account ↗

Living with wildlife

Give this snake space.

Venomous · Effects not yet summarised in this atlas

Observe from a distance. Do not handle, corner or capture a snake to identify it. An incomplete venom account is not evidence that a species is safe to handle.

After a suspected snakebite, keep the person still and arrange urgent medical care. Avoid tight tourniquets, cutting, suction and unproven remedies. Do not wait to identify the snake before seeking help.

WHO guidance on snakebite first aid

Species record

Taxonomy, occurrence & evidence.

Identity

Accepted name
Hydrophis inornatus
Common names
Plain Seasnake, Inornate Sea Snake
Authority
(GRAY 1849)
Year described
1849
Taxonomic status
Accepted species
Family
Elapidae
Subfamily
Hydrophiinae
Genus
Hydrophis
Species epithet
inornatus
Persistent ID
PH-SERP-DAF9EF0381
Checklist checked
2026-09-05

Philippine occurrence

Status
Present
Confidence
Confirmed
Basis
2018 Philippine synopsis treatment plus current RDB listing
Islands named
Panay

Range noteCountry/island text is not a range polygon or locality record.

Source distribution statement

South Chinese Sea (Philippines: Panay etc.), China (Tsingtau), Sri Lanka (fide WALL 1921), Indonesia (Java) [Schmidt 1852], Thailand, Australia (Torres Strait) Type locality: Indian Ocean

Knowledge coverage

EndemismResearch pending
EcologyLiterature documented
VenomVenomous
Effects not yet summarised in this atlas
Detailed research: Research pending
ConservationResearch pending

Names through time

Nomenclatural trail

Chitulia inornata GRAY 1849: 56 Chitulia fasciata GRAY 1849: 56 Thalassophis schlegelii SCHMIDT 1852: 83 Hydrophis manilae OWEN 1859: 77 (nom. nud.) Hydrophis Schlegelii — FISCHER 1856: 50 Hydrophis controversus JAN 1863 (fide SMITH 1926) Hydrophis longiceps GÜNTHER 1864: 375 (nom. subst. pro Chitulia fasciata) Distira ornata — WERNER 1896 Distira ornata BOULENGER 1896 Distira cyanosoma WALL 1913: 516 Chitulia ornata — WALL 1921: 369 Hydrophis ornatus inornatus — MITTLEMAN 1947 Hydrophis (Aturia) inornatus — MCDOWELL 1972: 229 Hydrophis inornatus — COGGER 1983: 250 Aturia inornata — WELCH 1994: 25 Hydrophis inornatus — COGGER 2000: 717 Chitulia inornata — KHARIN & DOTSENKO 2012 Hydrophis inornata — SANDERS et al. 2012 (by implication) Hydrophis inornatus — WILSON & SWAN 2010: 528 Chitulia (Chitulia) inornata — KHARIN 2012 Chitulia inornata — WALLACH et al. 2014: 165 Chitulia inornata — CHAN-ARD et al. 2015: 278 Hydrophis inornatus — EIPPER & EIPPER 2024: 260

Taxonomic and source notes

Venomous! Synonymy after COGGER 1983. Distribution: reports from Australia (Northern Territory, Western Australia) are probably misidentifications (Rasmussen et al. 2014). Habitat: marine. Type species: Chitulia inornata GRAY 1849 is the type species of the genus Chitulia GRAY 1849. Key: Kharin & Dotsenko 2012 have a key to the 12 species of Chitulia included by them in the genus. Nomenclatural history: see KHARIN & DOTSENKO 2012.

References attached to this record

2026

The Reptile Database — species checklist, 17 June 2026

Uetz, P.; Freed, P.; Aguilar, R.; Reyes, F.; Kudera, J.; Hošek, J. (eds.)

Open source ↗
2018

Synopsis of the Snakes of the Philippines: A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature

Leviton, A. E.; Siler, C. D.; Weinell, J. L.; Brown, R. M.

Proceedings of the California Academy of Sciences 64(14): 399–568

DOI: 10.5281/zenodo.11512589

Open source ↗
n.d.

Hydrophis inornatus — The Reptile Database species account

Uetz, P.; Hallermann, J. et al. (editors)

Public species fields consulted for bounded biological summaries. Primary sources quoted within the database were not independently examined unless explicitly stated. The catalogue name may differ from the current source title.

Open source ↗