Crab ID required

Any one know what type of crab this is ?

Was caught at Hill river on a bait from the beach

It had sea grass actually growing out of its nose (mouth)

Never seen one before ( it was released unharmed )

Cheers Grant .


Image Upload: 

Yewiefish85's picture

Posts: 735

Date Joined: 02/01/11

spider crab

Sun, 2012-03-25 22:05

spider crab

1268-EX's picture

Posts: 118

Date Joined: 18/01/12

yep spider crab

Sun, 2012-03-25 23:42

yep spider crab

Faulkner Family's picture

Posts: 15463

Date Joined: 11/03/08

 one ugly mother. i thought

Mon, 2012-03-26 05:27

 one ugly mother. i thought the spider crabs had longer legs , could be wrong. 


RUSS and SANDY. A family that fishes together stays together

jayce's picture

Posts: 564

Date Joined: 10/12/11

i caught one of them in the

Mon, 2012-03-26 07:51

i caught one of them in the same spot. Only place i have ever seen one and they are even uglier up close haha the photo doesnt do it justice

bitten's picture

Posts: 803

Date Joined: 07/04/10

deffintly a spider crabgood

Mon, 2012-03-26 08:10

deffintly a spider crab

good eating but you wont get much out of them its not really worth it they are a delicasy in some coutries but they get much bigger in other waters thats about the size of them here maybe a bit bigger but not much

when you get one with eggs lift the tail and have a look a them it looks like a stary night sky prety awesome


Posts: 9358

Date Joined: 21/02/08

Looks like a weevil!

Mon, 2012-03-26 08:11

Looks like a weevil!


grantarctic1's picture

Posts: 2543

Date Joined: 03/03/11


Mon, 2012-03-26 10:05

Thanks for the input guy's, We all called it a spider crab just because the way it looks , but i thought that name might cover a few species .

Glenn Moore's picture

Posts: 216

Date Joined: 13/02/12

'Brooding' Spider Crab

Mon, 2012-03-26 10:50

I'm no crab expert, but I asked our Crustacea Curator Andrew Hosie.  It is Paranaxia serpulifera.  It does not have a common name, but he suggested you could use 'Brooding' Spider Crab because the species is unusual in that it has direct development, brooding its young under the abdomen until they walk out as juveniles.  So, there is no planktonic stage, which most crabs have.  It was thought to be restricted to Australia, but was recently found in West Papua.  They are also called Decorator Crabs because they glue bits of weed, sponge, worm casings etc on their back for camouflage.


Glenn Moore

Curator of Fishes

Western Australian Museum

Blog Page

grantarctic1's picture

Posts: 2543

Date Joined: 03/03/11

Great reply

Mon, 2012-03-26 12:10

Thanks Glenn , i sugested to the guy's it was simular to a Decorator crab . The sea grass was imbedded deep into the snout and appeared to be growing there .

Cheers Grant .

Posts: 787

Date Joined: 05/12/09


Wed, 2012-03-28 17:55

Looks like a facehugger of the Aliens movie.......... almost!!  ;-)