Australian Aquatic Biological

Australian aquatic biodiversity research and consultancy

Research continues on the False Spider Crab Amarinus lacustris

False spider crabs Amarinus lacustris

False spider crabs Amarinus lacustris

False spider crabs Amarinus lacustris are a widespread and relatively abundant small crab species inhabiting low salinity and freshwaters waters in south eastern and eastern Australia, New Zealand, and Lord Howe and Norfolk Islands. They are a small freshwater crab species only reaching 10 mm in body width, with a distinctive H-shaped groove on their back. They are a slow growing species that can be covered with weeds or algae growing on their shell which makes them harder to see and for predators to find. It’s a small vulnerable species that is cryptic in nature and rarely seen or captured, spending most of their life hiding in thick reeds and roots or under rocks that offer protection and shelter from predators. Though widespread and when present they can be abundant (the ACP has found them at over 100/m2) they are a cryptic species that makes finding them difficult. The knowledge base on this species is relatively small, additionally, little has been done on the taxonomy and genetics of this widespread crab species and it is currently proposed that the current description may in fact represent three or more distinct species.

The False Spider Crab Amarinus lacustris from Stradbroke Island, Qld

The False Spider Crab Amarinus lacustris from Stradbroke Island, Qld

The ACP is intensifying research on this species and continues to collect specimens from across Australia. As we collect more specimens we are getting to know their habitat preferences and it’s becoming easier and easier to find these elusive creatures.

The False Spider Crab Amarinus lacustris from the Clyde River, NSW

The False Spider Crab Amarinus lacustris from the Clyde River, NSW

 

False spider crabs Amarinus lacustris from Cockrone Gul, Macmasters Beach, NSW

False spider crabs Amarinus lacustris from Cockrone Gul, Macmasters Beach, NSW

 

Rob McCormack

ACP

 

 

 

 

 

Research & Aquaculture Director for Australian Aquatic Biological P/L
Team Leader for The Australian Crayfish Project
Director of Mid West Yabby & Fish Traders and RBM Aquaculture
Secretary of NSW Aquaculture Assoc Inc
Research Associate for Carnegie Museum of Natural History
Honorary Research Fellow, Queensland Museum

You can follow any responses to this entry through the RSS feed. You can leave a response, or trackback from your own site.

Leave a reply

Your email address will not be published. Required fields are marked *

*

seventeen + six =