Status: Not yet established
Threat: Habitat alteration
- snail with a reduced apical spire or apex, and large aperture with distinctive inner shell
- smooth shell with irregular growth lines
- commonly found attached to others in curved chains of up to 12 snails.
- competes with native bivalve molluscs for space and food, reproduces very rapidly and consequently blankets whole areas of the sea floor
- believed to be moved primarily via the oyster trade, also by attaching itself to boat hulls.
- poses serious threat to the oyster industry
- filters out plankton; its deposits of shell and waste particles change the texture and nature of sediment
- can smother other organisms, reducing biodiversity and plant abundance.