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Mollusks


Giant African Snail (Achatina fulica)
Graceful Awlsnail (Allopeas gracile)
Rosy Wolf Snail (Euglandina rosea)

Tropical Leatherleaf (Laevicaulis alte)
Black Slug (Veronicella leydigi) ?
Two-stripe Slug (Veronicella cubensis) ?

Rams Horn Snail (Planorbidae sp.) (Planorbarius corneus) ?
Pond Snail (Physa fontinalis) ?



Giant African Snail

 

Introduced from Japan in 1936.

 

 

 

Graceful Awlsnail

 

Not native to Hawaii.  Date of introduction unknown.

 

 

 

Rosy Wolf Snail

 

The predatory Rosy Wolf Snail (also known as “Cannibal Snail”) is native to the south-eastern United States. It has been introduced into the Pacific and Indian Oceans Islands as a biological control agent against the giant African Snail (Achatina fulica). However, it is neither host specific nor an effective control for A. fulica and may consume a large number of rare native snails, including the numerous endemic partulid tree snails in French Polynesia (many of which it caused to become extinct in the wild). It has also been implicated in the decline of snails species in Hawaii and Mauritius. 

 

 

 

Tropical Leatherleaf Slug
Native to South America and the Caribbean.  Accidentally introduced sometime before 1978 (probably in the early 1970s).

 

 

 

Black Slug
Dorsal view.
   
Ventral view.  This slug is 5 cm long.

 

 

 

Two-striped Slug

 

The two-striped slug, with two longitudinal stripes on its back, was first reported on Oahu in 1985. Its color may also vary from beige to dark brown, and its stripes may be solid or broken.

 

 

 

Rams Horn Snail

 

This snail lives in the water in the fish pot and came along with the water lilies.  Does not naturally occur here.  Diameter = 6mm.

 

 

 

Pond Snail

 

This snail lives in the water in the fish pot and came along with the water lilies.  Does not naturally occur here.  Diameter = 9mm.