Marine life  /  Nudibranchs & sea slugs  /  Trapania
Reviewed 2026-09-06
Species entry

Trapania

Trapania

A small dorid with paired appendages beside the gills, feeding on entoprocts.

Size
To about 15 mm
Depth
5–25 m
Habitat
Sponge and bryozoan growth on rubble
Active
Day and night
Range
Indo-Pacific
Rarity
Lembeh Strait
4 stars of 5, two or three a season
SP-01
trapania · full body · habitat
4:3 · min 2400px

Small dorids, usually under 15 mm, with a smooth body and two pairs of slender appendages: one beside the rhinophores and one flanking the gills. That arrangement identifies the genus and separates it from every other small pale dorid on the same ground. Ground colour is white, cream or yellow, marked variably in black, orange or brown; the pattern differs between species and several regional animals are undescribed.

They feed on entoprocts, minute stalked animals that grow in colonies on sponges, bryozoans and hydroids, so they are found on the growth rather than out on sediment, and a colony that holds one often holds several. Recorded from about 5 to 25 m on rubble, sponge and jetty structure.

Where to find:

LocationRarity Best monthsDepthHabitat
Lembeh Strait Indonesia editorial estimate
4 stars of 5, two or three a season
Year-round
5–25 m
Sponge and bryozoan growth on rubble
Anilao Philippines editorial estimate
4 stars of 5, two or three a season
Year-round
5–25 m
Sponge and hydroid growth
Dauin & Dumaguete Philippines editorial estimate
4 stars of 5, two or three a season
Year-round
5–25 m
Rubble and sponge

Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.

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