Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, May 22, 2013. (CTK Photo/Libor Sojka)

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, June 6, 2013. (CTK Photo/Libor Sojka)

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, May 22, 2013. (CTK Photo/Libor Sojka)

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, October 8, 2011. (CTK Photo/Libor Sojka)

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, October 8, 2011. (CTK Photo/Libor Sojka)

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, October 7, 2011. (CTK Photo/Libor Sojka)

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium,crawfish

Marbled Crayfish, Deceitful Crayfish, Procambarus virginalis (Procambarus fallax f. virginalis), aquarium, Czech Republic, October 7, 2011. (CTK Photo/Libor Sojka)