Professor of marine biology Dr. Kory Evans answers your questions about fish from Twitter. Why are orcas attacking boats? What is the fastest creature in the sea? How do octopi change colors to match their environment? Are jellyfish immortal? Answers to these questions and many more await—it's Marine Biology Support.Director: Lisandro Perez-ReyDirector of Photography: Constantine EconomidesEditor: Richard TrammellExpert: Dr.