Classification The crayfish falls within the kingdom - anamalia, phylum - Arthropoda, Class - Crustacea, Order -Decapoda , and family - Cambaridae. Habitat Crayfish like to be where it's dark and cool, and during much of the daylight they will be found by them selves, under a rock or vegetation, waiting for dark, when they come out to forage for food. This is highly variable, ranging from deep holes to sluggish streams. A suitable habitat is …showed first 75 words of 576 total…

…showed last 75 words of 576 total…they have ducts which exit near the base of the second antennae) function in excretion and osmoregulation. Undigested material passes into the intestine. The intestine is attached to the lobed stomach. The undigested material is exiled from the anus. Respiratory System The gills are feather-like structures found underneath the carapace and attached to the chelipeds and walking legs. There is a constant flow of blood to the gills releases carbon dioxide and picks up oxygen.