Is a not so common girls name but if a girl is called Marlin they are usually really friendly and smart, there is a chance that they are kind of insecure about their looks while they're actually really pretty. It's fun to hang around with a Marlin and they will do anything to chear you up if you're sad since they can show alot of empathy .
She is so nice and pretty she must be a Marlin!
Referencing something so old and outdated that it actually has no bearing on the debate.
1st person: "Trying to have an intelligent debate with you is useless! Its like attacking a bulwark with a buckler!"
Person 2: " Now you're just trying to punch a marlin in the rose bucket."