Help With an ID Please!

[Star_Rider]

Crayfish vary considerably by species. generally where you find them the water is actually pretty clean.

here in the PMW we have the Pacifastacus leniusculus a fairly large cool water species. these can get about 8" from rostrum to telson(basically head to tail) they are meat eaters.

I catch them diving (SCUBA) I use bait the day before Usually a cn of fish flavor catfood. I have cught many that were over 7" from heat to tail. these won't fit into the std crayfish trap..
after I learn how big they get I started using shrimp pots.

 

[Squawkbert]

Generalities abt crayfish:

They have a ton of attitude and will go after larger stuff, defend themselves & territory aggressively, they'll eat anything that doesn't eat them first, they are (can be) escape artists (climbing airlines and exiting aquaria is common, they can walk around on floors for considerable distances).