Panulirus argus
Florida spiny lobsters grow up to 60 cm in length. They lack the pinching of claws unlike m,pst other crabs have. Their primary defense are the spines that cover its shell, which help protect them from predators. Caribbean spiny lobsters use a second pair of antennae in sensory perception, which are found folded along side their body when it's not in use. These lobsters have a striped body, brown-gray in color with yellow spots on the segmented tail. They also have compound eyes and can detect orientation, form, light, and color. If startled, these lobsters will kick their large abdominal tails rapidly to swim away backwards to safety.
Digestive system
There are several rhythms active in the lobster digestive system, and these correspond to the organs involved with the behavior. There is an esophageal rhythm that allows the lobster to take in food. There is the cardiac rhythm that involves the cardiac sac, the place where food is stored in the lobster. In addition to these two rhythms there are two more that have been well characterized for the lobster. The first of these rhythms is the gastric rhythm. This rhythm is responsible for the control of the calcified teeth that lay within the gastric mill of the lobster. Food moves from the cardiac sac into the gastric mill and is macerated by the action of the lateral and medial teeth. The second well characterized rhythm is the pyloric rhythm. The pyloric rhythm controls the pylorus or pyloric filter which is a system of valves and sieve plates that helps sort out the food particles so that they may be further digested. Each of these rhythms involves coordinated contractions of groups of muscles, sometimes firing together, and at other times firing in opposition. This rhythm generation has been scrutinized at the cellular level, and that research has generated excellent diagrams of the neural circuitry.