Either a cross or a hybrid. Crayfish ID?

[knifegill]

The pet store said a customer brought these in after buying one brown cray and one blue. This is one of their offspring. I don't know which blue cray he purchased, as the LFS sells the blue variant of a common species as well as a truly blue species. Any guess is better than my current hapless state.

I tried to shoot any landmark-like zones. Also, any health tips are welcome since a know little about crayfish in general. He was being kept it the narsty goldfish feeder tank, so I figure he might need a little TLC.

 

[Pomatomus]

In order for it to be the descendant of the truly blue species, the two species would have to be able to hybridize.

The blue variant of the common species is a recessive trait, though it is not too uncommon. Either way, it appears that your crayfish lacks the blue coloration, but may carry the trait. There is no real way to tell unless you are very familiar with crayfishes. There are over 330 species in the U.S. alone.

All I can say is that it doesn't resemble a yabby, if that's the truly blue one you were talking about. They are in a different family from the U.S. ones, so it is unlikely they would hybridize.

 

[Danzig86]

With yabbies they get that mottled coloration before moulting. I couldnt see and spurs on the last set of legs so i'd say its a fem too.

 

[Otto_VonBacon]

I've been breeding the offspring of a brown and blue p. alenii for a year or two now. I'm starting to get more bluer crayfish. Most just turn out like yours.