Description: The thin, fragile, bubble-like shell is pale brown in colour. It is largely hidden by the large parapodial lobes and the posterior pallial lobe. Body length is up to around 70 mm.

Habitat: Usually found in sheltered mud or muddy sand, especially Zostera seagrass beds.

Distribution: Recorded from the south of Britain and southwest and west coasts of Ireland.

Similar Species: Akera bullata is similar in appearance, size and habitat but the shell is at the end of the body. Haminoea hydatis has been recorded from the south coast of England. It differs from this species in its much smaller size and the fact that the parapodial lobes are small, leaving most of the shell uncovered.

Key Identification Features:

• Elongate slug with shell in middle of back, mostly hidden by 2 lateral lobes.
• Flat, shield-like head with tiny eyes.

Distribution Map from NBN: Haminoea navicula at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Haminoea navicula at iNaturalist World Species Observations database.

GBIF data for Haminoea navicula

WoRMS: Haminoea navicula at World Register of Marine Species. Accepted name: Haminoea navicula (da Costa, 1778). AphiaID: 140075.

Classification: Biota; Animalia; Mollusca; Gastropoda; Heterobranchia; Euthyneura; Tectipleura; Cephalaspidea; Haminoeoidea; Haminoeidae; Haminoea