Blog 14 Compare two of the organisms that we have dissected Discuss at least 2 similarities and 3 differences

There are some similarities and differences between crayfish and fish.First,their nerve system are almost the same.They both have a small brain which is next to their eyes.Their respiration is quite similar as well.Because they both live in the water.They use gills to breath instead of use lung.Their external apperance is differ a lot.Fish have a streamline body which can allow their to swim fast.While crayfish have walking legs in order to walk.Also,their excretory system is different because crayfish's anus is at the tip of its tail.