Haminoea vesicula (Gould, 1855) White Bubble Snail
Synonyms:  None
Phylum  Mollusca  Class Gastropoda    Subclass Opisthobranchia    Order Cephalaspidea     Family Atyidae
	Haminoea vesicula collected at Padilla Bay, WA
	(Photo by: Robbie Wheeling, July, 2002)

Description:  Shell usually less than 15mm long.  It is whitish or greenish yellow, with sunken spire.  Shell too small for entire body to fit in. The shell aperture, at the point where the shell is widest, is less than half the diameter of the shell (photo).  Size to 24mm.

How to Distinguish from Similar Species:  Similar species would include H. virescens, which has a larger shell, usually over 15mm long, thicker, and whitish and more opaque. Its aperture is more than half the diameter of the shell at the point where the shell is widest.
 

Geographical Range:  Alaska to Gulf of California

Depth Range:  Found intertidally to subtidally

Habitat:  Abundant on mud flats and sandy-mud areas of bays, and on boat floats.

Biology/Natural History:  This species burrows just below the surface of the sand or mud.  Predators include the nudibranch Navanax inermis.  Eggs are deposited in a thick, coiled, deep-yellow egg string about 10 mm wide and up to 20 cm long (photo).

  Behrens, 1991
  Morris et al., 1980

Scientific Articles:

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This individual was one of thousands on eelgrass and Ulva in Padilla Bay, July 2005.  Photo by Dave Cowles.  Scale is millimeters.
Note the partly transparent shell visible through the dorsum.

An individual in situ in Padilla Bay.  On Ulva.  Photo by Dave Cowles, July 2005

The eggs are yellow and in clusters about 2-3 cm long.

The shell is very light and fragile and around 1.5 cm long (scale is in millimeters).
The width of the aperture, at the point where the shell is broadest (near the middle), is just over 1/3 the total shell width.
Photo by Dave Cowles, July 2005
 

Authors and Editors of Page:
Robbie Wheeling (2002):  Created original page
Editors:  Dave Cowles 8-2002, 2005
              Hans Helmstetler 1-2003