Crayfish Anatomy

3. The movable, top finger of the crayfish' claw.
5. The second part of the crayfish; has five main segments, and is commonly called the "tail".
7. The four fins that attach to the telson, creating the wide "fin" at the end of the tail.
8. The large, muscle-filled part of the claw, where the fingers attach.
11. The four, short hair-like sensory organs at the tip of the crayfish' carapace.
13. The family of arthropods that crayfish are in.
15. Another genus of crayfish, found in North America.
17. Genus of crayfish that usually exhibit burrowing lifestyles.
18. The last segment of the tail; where the uropods are attached.
19. The seminal receptacle of female crayfish.
20. The large, strong claws of the crayfish, used in capturing and manipulating food, breeding, and defense.
21. A raised projection on the surface of a crayfish; usually refers to the bumps on the chelae.

1. The first section of the crayfish; where most appendages are attached.
2. Small, flexible appendages used for feeding and grasping food. Located on either side of the mouth.
4. A large genus of crayfish, found throughout the US, and in some other countries.
6. A smaller genus of crayfish; includes the invasive Red Swamp Crayfish.
9. the two main sensory organs, found at near the rostrum and eyestalks.
10. The first two, enlarged sets of swimmerets in male crayfish. Used for sperm transfer.
12. The small, feather-like appendages under the tail; first two pairs are enlarged in males.
14. The pointed projection that is in between the eyestalks of a crayfish. Used for identification.
16. The hourglass-shaped pattern on the crayfish' back, outlining the gills. Usually used for identification.