Lembeh — 6 September 2026
- Location seen
- Lembeh, Indonesia
- Date seen
- 2026-09-06
Notarchus indicus
Indian Sea Hare
© Di Syrett / MacroDivers.com
About this species
- Current scientific name
- Notarchus indicus
- Common name
- Indian Sea Hare
- Order
- Sea Hares (Anaspidea)
- Type
- N/A
- ID confidence
- Confirmed
- Genus
- Notarchus
- Species
- indicus
- Average size
- 35 mm
- Colours
- white, yellow, orange, brown, cream
- Pattern
- Spots
- Body shape
- Oval
- Rhinophores
- Rolled
- Gills
- Hidden
- Similar species
- Styloheilus striatus, Notarchus punctatus
Geographic Distribution
Widespread in Indo-Pacific.
Identification
Sea Hare with balloon shaped body but without a shell (which is completely absent in this species). The parapodia are fused and scattered with brown dots and white tubercles. The rhinophores are rolled.
Behaviour / Habitat
Notarchus indicus can swim using jet propulsion by expelling water from the siphon located between the fused parapodia.
General Notes
There is currently only one other species in this genus - Notarchus punctatus. It is very similar but larger. It is distinguished from the Styloheilus striatus (Lined Sea Hare) which has dark lines and an elongated tail.
Our Sighting
About our records
All sightings and photographs on this page are from our own dives. Locations shown are places where we have personally recorded this species. About MacroDivers.