The blue runner caranx crysos also known as the bluestripe jack egyptian scad hardtail jack or hardnose is a common species of moderately large marine fish classified in the jack family carangidaethe blue runner is distributed across the atlantic ocean ranging from brazil to canada in the western atlantic and from angola to great britain including the mediterranean in the east atlantic. As a general rule a person in this position is passionate about and. A marine biologist is someone who works in some branch of marine biologygiven that around 70 percent of the earths surface is covered in oceans you can imagine that marine biology is a very large field encompassing everything from studies of ocean currents to analysis of the creatures who live next to hydrothermal vents.