Greenish grey body with three teeth between the eyes and four teeth around the front of the side margin. The hindlegs are less flattened than on almost all other members of the family Portunidae. This species occurs abundantly under stones and in crevices at shallow estuarine sites. It was introduced into Australia from Europe in the 19th century and has also been introduced into North America. The species is an active predator and has probably affected the populations of a number of local animal species.

• Max Size: 7 cm
• Sea Temperature Range: -0.2-19.6°C
• Depth: 0-5m
• Habitat: Rocky Reef, Soft sediment

• IUCN Threat Status: Not Evaluated
• Occurrence: Infrequent (1% of sites)
  Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed
• Abundance: Few (3 per transect)
  Abundance is calculated as the average number of individuals recorded per RLS transect, where present.