Dissection Survey Set - Zoology Survey Set, 6 Medium Specimens Set consists of one each of the following: 6" to 8" Earthworm, 3" to 4" Crayfish/, 3" to 4" Clam, 5" to 7" Perch, 2-1/2" to 3" Grass frog, 10" x 6" and 3" to 5" Starfish (population permitting) OR Grasshopper (when Starfish is not available due to the decline of the Starfish population (Starfish Wasting Disease)