Field notes
Encounter profile
Identified using .
Thuridilla gracilis - Thuridilla - A marine genus.
Species profile
Slender Sap Sucking Slug
Thuridilla gracilis
Identified using .
5
Media items
Photos and videos
3
Dives
Distinct encounters
2
Locations
1 trip
Photographic identification review
1/5 exact media auditedDiffers from archive labelReviewed image hypothesis
Thuridilla cf. bayeri
cf. / closest supported match assessment across 1 exact media item. The archive is currently filed as Thuridilla gracilis; a reviewed hypothesis is evidence, not a silent relabelling.
Archive ecology
Conditions where we found it
SNAP observations, not the species’ full biological range.
- Depth evidence
- 12.2–13.1m
- Median 12.3m · n=4
- Water temperature
- 25.0–28.0°C
- Median 27.0°C · n=5
Depth basis: 0 recorded, 4 profile-estimated, 1 contextual.
Tight observed depth band
All 4 depth-linked observations in SNAP fall between 12.2m and 13.1m.
View distributions & comparisons▾
Indicative archive pattern · 5 observations / 3 dives
Observed depth distributionmiddle 50%: 12.2–12.5m
- • 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.
Creature trail
A life through time and place
Species field guide
Notes, taxonomy, identification & seasonality
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Species field guide
Notes, taxonomy, identification & seasonality
Identification audit
Audit history for photographed encounters
2 assessments across 1 exact media item. Each records who reviewed the image, when, what they concluded, and why. These assessments remain separate from iNaturalist computer vision and from the current canonical Gallery label.
cf. / closest supported matchLatest audit record
Conclusion: Thuridilla cf. bayeri
Reviewed by Codex identification research on Aug 27, 2026 · 65% reviewer confidence.
Reasoning recorded at review
- Rhinophore has an orange-red apical section
- A broad transverse white band lies immediately below the orange-red section
- The remaining rhinophore is dark
- This excludes the Fig. 5(a) T. gracilis pattern
Alternatives considered
- Thuridilla sp. 4 sensu Martin-Hervas et al. (2021)
Why plausible: Fig. 5(f) has a closely similar orange-red, white and black rhinophore sequence
Comparison: A clearer dorsal view resolving the blue-green head and body markings is needed
- Thuridilla bayeri
Why plausible: Best match to Fig. 5(c) among illustrated patterns
Comparison: Confirmation needs the diagnostic body colour or spot characters or specimen evidence
Evidence limits & sources +−
- • Sharper original-resolution dorsal view of the head and body markings
- • Expert comparison with T. bayeri and Thuridilla sp. 4 material
- • Specimen or DNA evidence for a definitive assignment
Molecular phylogeny of Thuridilla and the gracilis species-complex ↗Primary paper · Martin-Hervas et al. 2021 · Fig. 5(c) and 5(f), p. 17Gary diagnostic plate leadExpert opinion · Personal communication relaying the published plate · Fig. 5Show 1 earlier assessment +−
Earlier audit record
Conclusion: Thuridilla cf. bayeri
Reviewed by local operator on Aug 27, 2026 · 65% reviewer confidence.
Reasoning recorded at review
- Rhinophore has an orange-red apical section
- A broad transverse white band lies immediately below the orange-red section
- The remaining rhinophore is dark
- This excludes the Fig. 5(a) T. gracilis pattern
Alternatives considered
- Thuridilla sp. 4 sensu Martin-Hervas et al. (2021)
Why plausible: Fig. 5(f) has a closely similar orange-red, white and black rhinophore sequence
Comparison: A clearer dorsal view resolving the blue-green head and body markings is needed
- Thuridilla bayeri
Why plausible: Best match to Fig. 5(c) among illustrated patterns
Comparison: Confirmation needs the diagnostic body colour or spot characters or specimen evidence
Evidence limits & sources +−
- • Sharper original-resolution dorsal view of the head and body markings
- • Expert comparison with T. bayeri and Thuridilla sp. 4 material
- • Specimen or DNA evidence for a definitive assignment
Molecular phylogeny of Thuridilla and the gracilis species-complex ↗Primary paper · Martin-Hervas et al. 2021 · Fig. 5(c) and 5(f), p. 17Gary diagnostic plate leadExpert opinion · Personal communication relaying the published plate · Fig. 5
Archive
All media records
5 media items
Optional context
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Life found nearby
Species photographed on the same dives come first, followed by close taxonomic neighbours.
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