Swelling in one leg is most often either the result of a clot blocking the blood flow, an injury in a person's leg, or inflammation from arthritic conditions. There are also some cases in which swelling in one leg might be caused by water retention, which could signal major organ failure.
The shrimp Palaemon serratus of the infraorder Caridea. The term shrimp is used to refer to some decapod crustaceans, although the exact animals covered can vary. Used broadly, it may cover any of the groups with elongated bodies and a primarily swimming mode of locomotion â most commonly Caridea and Dendrobranchiata.
The common shrimp (Palaemon affinis) is often seen darting about in rock pools. It has a semi-transparent body marked with lines of red and green, and conspicuous spots of orange and black on its leg joints and at the base of its tail.