My Blue Crayfish Dairy

[Aozora]

Dscheng,

from the picture you posted, it looks like a female.

[Dscheng]

Wa really ar.. But my female quite aggressive le. Keep attacking my orange one..

[Aozora]

If possible you can take a picture of its bottom view so that we can give a much confirmation answer.

Crayfish are territorial creatures and are usually aggressive.