Thomas Leeuw is a fourth year Marine Biology major here at the University of Maine, Orono. Thomas has been interested in the ocean for as long as he can remember, and has been diving since the age of 12. He currently works here on campus in the In-situ Sound and Color lab under Dr. Emmanuel Boss. This spotlight focuses on two major projects Thomas has completed, one of which placed in the CUGR (Center for Undergraduate Research) showcase, and the other of which is his capstone. The first project involves mapping the distribution of the invasive tunicate Didemnum vexillum on the ocean floor of Georges Bank (one of the world’s richest fishing grounds) off the coast of Maine. The second project is Thomas’ capstone in which he designed and built a low-cost in-situ fluorometer to compete with commercial products of the same caliber.