Home > Invertebrates  > Slugs > Bubbles > Hydatina physis

Updated 1/1/2026

Family Aplustridae

CIRCUMTROPICAL / HAWAII

Hydatina physis



Mokapu, Oahu

Hawaii Island

 

Hau'ula, Oahu

 

PAPER BUBBLE

Uncommon in silty sand under rocks in shallow water during winter months.  The shell is coated with a thin yellow periostracum.  Shell attains 2.6 inches, 65 mm.  Worldwide in warm seas.