Arthropoda
Then we discussed the phylum Arthropoda, because both crayfish and grasshoppers are arthropods. Insects, arachnids, and crustaceans are the main arthropods we know, and they all have a protective exoskeleton and jointed appendages. Wikipedia says they are like Swiss Army knives, they can do all sorts of things. The grasshopper is an insect that lives on land. Both grasshoppers and crayfish are arthropods, a phylum of animals that arose 500 million years ago during the Cambrian period and now comprise 83% of all animal species. All crustacean ancestors began life in the oceans. The crayfish’s ancestors moved to fresh water, the grasshopper’s became terrestrial. Arthropods are among the most disgusting animals around. Insects from ants to roaches. Millipedes, centipedes, scorpions, crabs, lobsters, crayfish are all arthropods. Evolutionary, arthropods are notable because they were the first animals to inhabit land. Arthropods. Arthropods are among the most disgusting animals around. Insects from ants to roaches. Millipedes, centipedes, scorpions, crabs, lobsters, crayfish are all arthropods. Evolutionary, arthropods are notable because they were the first animals to inhabit land. Many crayfish suffer from crayfish plague, described above. Grasshoppers are in the subphylum Hexapoda (six-legged arthropods) and the class Insecta, and their three main body parts are the head, thorax, and abdomen. They have short antennae, and some make noise by rubbing their hind femurs against their forewings or abdomen.
http://alanatomy.blogspot.com/2012/11/crayfish-and-grasshoppers.html http://www.ehow.com/info_8358195_characteristics-grasshoppers-crayfish-share.html http://www.bio200.buffalo.edu/labs/arthropods.html http://www.bio200.buffalo.edu/labs/arthropods.html http://alanatomy.blogspot.com/2012/11/crayfish-and-grasshoppers.html
what phylum are crayfish and grasshoppers in