Chromodoris strigata Rudman, 1982

シボリイロウミウシ Chromodoris strigata

Location
Pulau Bali, Indonesia
Date
2006/08/13
Length
20mm
Depth
23.0m
Water temperature
28.0℃

Description

Background colour of the mantle pale bluish-white with a regular arrangement of non-pigmented areas that appear dark bluish-grey. Black lines of irregular width run longitudinally down the mantle. In Indian Ocean specimens five lines are typical: a thin black midline from in front of the rhinophores to the gill pocket, a pair starting in front of the rhinophores and running outside the rhinophore and gill pockets, and a pair of short outer lines alongside the orange border. In Australian material the lines are thicker and irregular, with the median line sometimes broken into a short anterior section and a longer posterior section that broadens midway into an elongate diamond. The mantle border has a broad watery-orange band, sometimes partly interrupted by whitish patches of the background colour — the species is easily recognised by the way the bluish-white background extends "tongue-like" overlaps into the orange margin. Gills and rhinophores share the same watery-orange tone. Sides of the body pale bluish-white with watery-orange border; two black lines run down each side of the foot, joining anteriorly above the head and running back along the foot. Maximum body length about 25 mm.

Distribution

Type locality: Broadhurst Reef, Townsville, Queensland, Australia. Originally recorded from the Great Barrier Reef, the Coral Sea, and the western Indian Ocean north of Madagascar (Comoro Islands); probably has a wider Indo-West Pacific distribution.

Etymology

The specific epithet strigata is Latin for "streaky" or "striped", referring to the irregular longitudinal black striping of the mantle.

Remarks

Easily recognised among species of its colour group on its much paler colours, the orange border with tongue-like overlaps of the bluish-white background, and the unusually prominent denticles of the lateral teeth.

References

A Kindle field guide by the site author

Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition. cover

Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition.

Kindle Edition

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Academic Database

Sea slug observation data is available in international marine biodiversity databases.

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