Nature By NameSign inCreate an account

Other animals › Astacid Crayfishes

Signal Crayfish

Pacifastacus leniusculus

Learn Signal Crayfish freeHow it works
Wildlife study photograph from iNaturalist.
(c) luxquine, some rights reserved (CC BY-NC)

31 photos

Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.

See all photosAdd a photo

Photos you add are credited to you, and you keep the copyright.

Easily confused with

Study checks a spoken answer against these, and tells you which one you named.

Where it is recorded

Records by month in Alaska.January 1,143, February 844, March 1,322, April 2,080, May 2,999, June 3,270, July 3,500, August 3,010, September 2,210, October 1,649, November 901, December 704.
United States28,466
Alaska23,632
Oregon2,061
California1,686
Canada817
British Columbia800
Washington788
United Kingdom631
England618
Austria453

Counts show where people looked, not only where it lives.

Traits

Physical

  • ExoskeletonHas a hard external skeletonFrom its classification

Classification

KingdomAnimals · Animalia
PhylumArthropods · Arthropoda
ClassMalacostracans · Malacostraca
OrderDecapods · Decapoda
FamilyAstacid Crayfishes · Astacidae
GenusPacifastacus

Sources

Remember the name next time.

Practise Signal Crayfish with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.

Create a free accountHow it works