Many aquatic species are known to be extremely successful at invading in non-native waters, due to their ability to thrive under a wide variety of environmental factors. Therefore, understanding the physiological advantages invasive species may have over native species gives insight into the differences of fitness allowing them to outcompete. It has recently been shown that the green shore crab (Carcinus maenas) has the ability to uptake nutrients, in the form of amino acids (e.g. L-Leucine), through its gills from the surrounding environment. However, it was previously unknown how many other species of crustacean are capable of environmental nutrient uptake, and what the implications of changing environmental factors may have on nutrient uptake rates. Dissolved nutrient acquisition in Carcinus maenas, Metacarcinus gracilis, Cancer magister, and Cancer productus were evaluated using in vitro gill perfusion to conduct kinetic nutrient transport assays with the amino acids L-leucine and L-alanine. When compared to the native species, the invasive Carcinus displayed uptake kinetics of a high capacity and high affinity transporter. This research investigates the importance of this nutrient pathway in the invasive success of Carcinus and determines if dissolved nutrient acquisition is unique to Carcinus or if it can be found across various crustacean species.