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Species profile

Swallowtail Headshield Slug

Chelidonura hirundinina

Identified using iNaturalist WoRMS.

7
Media items
Photos and videos
4
Dives
Distinct encounters
2
Locations
2 trips
View all 7 media items ↓

Archive ecology

Conditions where we found it

SNAP observations, not the species’ full biological range.

Depth evidence
4.9–4.9m
Median 4.9m · n=1
Water temperature
25.0–25.0°C
Median 25.0°C · n=3

Depth basis: 0 recorded, 1 profile-estimated, 2 contextual.

Consistent water window

3 observations with dive temperature sit within 25.0–25.0°C.

View distributions & comparisons▾

Indicative archive pattern · 5 observations / 4 dives

Observed depth distributionmiddle 50%: 4.9–4.9m
0–5m

Calendar-quarter observations

Apr–Jun2
Jul–Sep3

Camera-clock comparison

Morning · 2Night · 3
  • • These distributions describe photographs in SNAP, not a species’ complete biological range.
  • • Depth distributions use recorded or capture-time profile estimates; dive-average and maximum context is excluded.
  • • Time-of-day groups use the camera clock and are not corrected for sunrise, sunset, or timezone.
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Creature trail

A life through time and place

4 encounters

  1. #4 · Jul 14, 2026

    Toiwala

    Tawali, PNG · Asia 2026

    5.3m · Dive-average context25.0°C

  2. #3 · Jul 13, 2026

    Cathy's Corner

    Tawali, PNG · Asia 2026

    4.9m · Estimated at capture time25.0°C

  3. #2 · Jul 12, 2026

    Lawadi

    Tawali, PNG · Asia 2026

    5.9m · Dive-average context25.0°C

  4. #1 · Jun 9, 2025

    Puerto Galera

    Puerto Galera · Philippines 2025

Species field guide

Notes, taxonomy, identification & seasonality

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Field notes

Encounter profile

Identified using iNaturalist WoRMS.

Chelidonura hirundinina - Chelidonura is a genus of small, sometimes colorful, sea slugs. These are headshield slugs or cephalaspideans, marine opisthobranch gastropod mollusks in the family Aglajidae.

Archive

All media records

7 media items

Optional context

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Life found nearby

Species photographed on the same dives come first, followed by close taxonomic neighbours.

Explore this group
Ornate Ghostpipefish3 shared dives
Ornate Ghostpipefish
Solenostomus paradoxus
Tawali, PNG
Squat Anemone Shrimp2 shared dives
Squat Anemone Shrimp
Thor amboinensis
Tawali, PNG
Warty Anglerfish2 shared dives
Warty Anglerfish
Antennarius maculatus
Tawali, PNG
Anna's Chromodoris1 shared dive
Anna's Chromodoris
Chromodoris annae
Puerto Galera
Banded Sea Urchin1 shared dive
Banded Sea Urchin
Echinothrix calamaris
Puerto Galera
Bicolor nudibranch1 shared dive
Bicolor nudibranch
Samla bicolor
Tawali, PNG

Related context

Seen on

Asia 2026
Tawali, PNG / Jul 14, 2026 / 3 records
Philippines 2025
Puerto Galera / Jun 9, 2025 / 2 records