Please ID

[CaliforniaShawn]

Can anyone tell me exactly what this guy is? Thanks.

 

[gtclipse01]

looks like a blue yabbi to me.

 

[black_sun]

Cherax quadricarinatus (red claw crayfish). And how big is it? Looks to be a female (but if it's still young, could be a male) , as the males have orange-red patches on the outside of their claws like this:

This is one of the larger species of crayfish available in the pet trade. There's information in this forum up in the stickies, if you need some quick basic info.

 

[Lepisosteus platyrhincus]

that, my friend, appears to be a crayfish.... lol
its a quad.