Crayfish Dissection - BIOLOGY JUNCTION Remove all jointed appendages of the crayfish and attach them to the table on the crayfish worksheet. If dissection is two day, complete steps 13 and 14 only! 13. Next you will study the internal anatomy of a crayfish. If you must store your specimen until the next lab period, cover it with a dampened paper towel.Crayfish Appendage Table · Crayfish Worksheet[PDF] Crayfish Dissection Lab - Monadnock Regional High School Crayfish Dissection Lab Directions: Follow the directions step‐by‐step, locating each of the structures in the order they appear in the directions. You may want to review terms you don’t remember (cephalothorax, thorax, rostrum, telson, carapace, and dorsal) before you start this dissection.