Crayfish
1. What are the features of a crayfish?
2. bilateral symmetry
2. exoskeletons
3. made of chitin
3. provides support and protection
2. jointed appendages
2. segmentation
3. crayfish have a cephalothorax
4. head and thorax fused together
4. legs attached here
2. use gills to breath
2. 2 pairs of antenna
2. 2 compound eyes on stalks
3. can see images and detect movement
2. mandibles for chewing
3. move from side to side
2. chelipeds – 1st pair of legs
3. large claws used to catch and crush food
2. walking legs – next 4 pairs of legs
2. swimmerets – used for swimming and
reproduction