To catch a Black Marlin, you’ll first need to understand where to see them. Seth Perfect patio for doggy dining The Black Marlin has an extremely spacious outdoor patio with various tables to pick from with a lot of sun and shade. He or she are found in many of the world’s popular fishing destinations. Black marlin may also be easily distinguished from different marlins since they are the sole marlin that have rigid pectoral fins which can’t be folded flat against the body. Glassell’s black marlin is considered to be 30 decades old.